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can someone help me with this question lol, i’ll mark as brainliest if correct
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Hi there! Before we start with your problem. Recall the Trigonometric Function of (-x) first.
sin(-x) = -sinx cos(-x) = cosxtan(-x) = -tanxNow what we need to do is to imagine a unit circle. We know that angle (-x) rotate clockwise while (x) rotates counterclockwise.
Now imagine if it rotates clockwise, it:d start at the fourth quadrant first. That means the y-value is negative while x-value is positive.
We also know that (x, y) = (cos, sin)
Now move to the 2(pi)/3.
[tex] \large{ \frac{2 \pi}{ 3} = \frac{2(180)}{3} \longrightarrow 2(60)= \boxed{120 \degree}}[/tex]
Thus, the value of 2pi/3 is 120°
Now imagine again. In a unit circle, 120° is in second quadrant if we rotate counterclockwise. But if we rotate clockwise, where would the 120° be? Remember that (-x) rotates clockwise. That's right! (-120°) is in the third quadrant. In the third quadrant, cos is negative there along with sin.
So we can conclude that:
cos(-120°) is in third quadrant. cos and sin are negative in third quadrant.120° is also a reference angle of 60° because of 180°-60° = 120°
Thus,
[tex] \large{cos( - \frac{2 \pi}{3} )= cos( - 120 \degree) = cos(120 \degree) \longrightarrow - \frac{1}{2} }[/tex]
Answer/Conclusions
cos(-2pi/3) = -1/2cos(-2pi/3) use the reference of 60°cos(-2pi/3) is in third quadrant.5/6 divided by 2/3=
Divide. Write in simplest form. Check by multiplying
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Decimal form: 1.25
Mixed numbers form: 1 1/4
210 students were asked whether they want to go to a water park or a roller skating rink for a class party. 50 students are girls who want to go to the water park. 45 students are girls who want to go skating. 60 students are boys who want to go to the water park. Answer the questions to analyze the data. 1. Use the given information to fill in the two-way table. ‘a Water park Skating Total Boys 60 55 115 Girls 50 45 95 Total 110 100 210 2. How many boys want to go skating? 55 3. To the nearest hundredth, what is the relative frequency of boys who want to go to the water park? 4. The probability that a student is in a category can be approximated by the relative frequency. To the nearest hundredth, what is the probability that a randomly selected student is a girl who wants to go skating? Show how you know. 5. Are there more boy students or girl students? Do you read this information from the joint frequencies or the marginal frequencies? Explain how you know. 6. Which destination is more popular, the skating rink or the water park? Explain how you know.
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Help please. Geometry.
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STOP IGNORING ME AND HELP ME NOW
A golf course has a circular island of grass with a diameter of 15 yards. The mowing company charges $6.50 per square yard. How much will the golf course have to pay to maintain the grass on the circular island?
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Answer:
about $1148.06
Step-by-step explanation:
Your goal is to find the area of the island of grass and multiply that area by the cost per square yard.
Area = radius * radius * pi
You are told that the diameter = 15 yards. We also know that the radius that we need is half of the diameter. Radius = 7.5 yards.
This means that the Area = 7.5 * 7.5 * 3.14 = 176.625 square yards
Then we multiply by the cost per square yard:
176.625 * 6.50 = 1148.06 is your answer
Will cost about $1148.62
5 tickets sell for $32.50. How many tickets can be bought for $71.50?
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Answer:
11
Step-by-step explanation:
32.5 divided by 5 = 6.5
71.5 divided by 6.5 = 11
the answer is 11
Answer:
11 tickets
Step-by-step explanation:
Divide $32.50 by 5 to find the price per ticket
Divide $71.50 by $6.50 (the ticket cost) to get the number of tickets that can be bought with $71.50
Hope this helps :)
I need the Answer NOW
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Answer:
352 cm
Step-by-step explanation:
The circumference of a circle is given by the radius times 2 times π:
2•56•3,14 = 351,68 ≈ 352 cm
If the rectangle ABCD rotated 90 degrees clockwise, which coordinate
represents the new coordinates for A?
A B
A) A'(4,3)
B) A'(3, 4)
C) A'(-4,-3)
D) A (1,4)
.
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Answer:
The answer will be A) A'(4,3)
Step-by-step explanation:
90 degrees will send the rectangle to Quadrant 1, the rectangle itself has also been rotated so by rotating the rectangle 90 degrees and putting it in place for quadrant 1, it should give you the answer.
(You can also rotate the image)
Again help!!!!!!!!!!!!!!!
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Answer:
where is the picture of the table?
Step-by-step explanation:
The starting numbers and why are already entered in the table below the blanks and the table represent the next two terms for each of the patterns the pattern for the X values is add 2 the pattern for the Y values is add 4 which graph represents ordered ordered pairs of the first three terms of the patterns from the table?
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u flipped the screen
1 minute 25 seconds =
seconds
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Answer:
75
Step-by-step explanation:
Answer:
85 seconds
Step-by-step explanation:
1min=60 seconds
60+25 seconds =85 seconds
please identify this shape I am confused
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This is a triangular prism
please help giving brainliest
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Ally sliced 32kg of watermelon for a party. She divided the watermelon slices equally between 8 large bowls.
How many grams of watermelon did Ally put in each bowl?
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Answer: 4000 Grams
(Edited! I was wrong!)
Step-by-step explanation:
32 divided by 8 is 4. Add the units, and youre done! (x1000 bc 1000 kg are in a gram)
Answer:
4000g
Step-by-step explanation:
32kg=32000g
32000/8 bowls=
4000g
I need help, my teacher didn't really explain it well. Help the best you can :)
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Step-by-step explanation:
hey,u need help with what?
Answer:
ohhh..thats really sad. what may i help you with
Step-by-step explanation:
Heena has to make gift hampers out of 40 chocolates, 24 chips packets and 16 juice packets. The gift hampers have to be identical and contain all three items. What is the maximum number of such gift hampers she can make without leaving any item?
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A can of tuna is in the shape of a cylinder. The distance around the top of the cylinder is approximately 251.2 mm. The tuna company plans on making the cap opener the length of the radius of the top. What will the length of the cap opener be?
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Answer: 40 mm
===============================================================
Explanation:
I'm assuming your teacher used pi = 3.14 to compute the circumference.
If so, then,
C = 2*pi*r
251.2 = 2*3.14*r
251.2 = 6.28r
6.28r = 251.2
r = (251.2)/(6.28)
r = 40 mm is the radius
CAN SOMEONE HELP ME ASAP TJANKS ILL MARK AS BRAINLIEST IF CORRECT
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10 POINTS! NO LINKS!
Hi I need help with this, I just started learning about this type of stuff and I don't really understand it.
So if you could also explain it a bit that would help a ton!
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Answer:
164.48 or 164.5
Step-by-step explanation:
So, to make it simpler, you can do the circle like this: 3.14×(8×8). Then you can work down!
3.14 × 64
200.96
and then because it's halved, you divide by 2
100.48
then that's the half circle
The square would just be 8×8=64
then add the circle and the square and viola!
164.48
solve please thanks so much
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Answer:
13
Step-by-step explanation:
26 would be the diameter and radius is half of diameter
Please help honestly loving you helpers.. IT SAYS: what is the surface area of this figure/Remeber there is a difference between the surface area the lateral surface area. This is specific to the surface Area. Remeber to show your work’
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SA= 10x10+6(1/2x12x10) would be the equation, solve and you’d end up with 460! I’m not positive this is the answer, just based off of what I remeber
1) 12q^3 3q^2 = 4q (12/3 = 4) and (exponent 3 minus exponent 2 = 1)
2) 15s^5 5s^3 = 3s^2
3) 16r^10 8r^8 = 2r^
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Answer:
its 2 i think
Step-by-step explanation:
Answer:
its 2
Step-by-step explanation:
1. 4 1/5 x 2 ⅔ write in a simplest from.
2. 2 6/7 x 2 ¼ write in a simplest from.
3. A lake is 3 ¼ miles wide. Tony sailed 4/5 the width across the lake. How far did Tony sail?
4. 6 x ⅔ write in a simplest from.
5. 2/7 x 9 write in a simplest from.
6. 5/6 x 12 write in a simplest from.
7. There are 24 muffins in a bakery. If 3/8 of the muffins are blueberry, how many muffins are blueberry?
8. How many feet are in 27 yards?
9. Kenya had 45 flowers in her garden. If she picked 3/5 of the flowers in her garden, how many flowers did she pick?
pls can someone at least answer all of it, pls its for a grade i need this. if i dont do this my grades are already dropping and my parents are really mad at me and i dont know what to do and this the only assignment that could change my grade. pls and if you do THANK YOU SO MUCH!!
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Answer:
1)
[tex] \frac{28}{5} [/tex]
or
[tex]5 \frac{3}{5} [/tex]
2)
[tex] \frac{10}{7} [/tex]
or
[tex]1 \frac{3}{7} [/tex]
4)
[tex]4[/tex]
5)
[tex] \frac{ 18}{7} [/tex]
or
[tex]2 \frac{4}{7} [/tex]
6)
[tex]10[/tex]
Answer:
1. 28/5
2. 10/7 or 1 3/7
3. 13/5 miles or 2.6 miles
4. 4
5. 18/7 or 2 4/7
6. 10
7. 9 muffins
8. 81 feet
9. 27 flowers
Step-by-step explanation:
1. 4 1/5 • 2 2/3 = 28/5 or 5 3/5
2. 2 6/7 • 2 1/4 = 10/7
3. 3 1/4 • 4/5 = 13/5
4. 6 • 2/3 = 4
5. 2/7 • 9 = 28/7
6. 5/6 • 12 = 10
7. 24 • 3/8 = 9
8. 27 • 3 = 81 (multiply 27 by 3)
9. 45 • 3/5 = 27
I hope this helps, good luck! ;D
BTW I feel your pain, I really wish you the best of luck!
Please help, Don't know the answer
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where d is the distance in kilometers and t is the time in hours
The speed of train A is 70 kilometer per hour
To find speed of train B use the table
find out slope
The speed of train B is 75 km per hour
The speed of the train B is more
Train B is going faster
Help its due at 1 Pm
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Answer:
I FEEL LIKE 1920 DICE CAN FIT IN THE BOX
this is what i did
I found the area of the box (240) and the dice (1/8),
I divided the numbers (240÷ 1/8) and go 1920
IM SORRY IF ITS WRONG I TRIED
rewarding BRAINLY FOR CORRECT ANSWER
Four statements are given. Which one is true?
The opposite of a 0°F wind chill is 0°F.
A temperature of –(–8°F) is the same as a temperature of –8°F.
A wind chill of 0°F and one of –1°F are examples of opposite numbers.
On a thermometer, 5°F would be located on the opposite side of 0 from –(–5)°F.
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My answer Is The 4th Statement because a positive number is on the other side of the number line as the negative number and if it were just negative 5 and positive 5 it would be correct. I’m just trying the best I can to help you .
Evaluate the expression: 7 • (10 + 3 ) – 82
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Answer:
9
Step-by-step explanation:
i hope this helps!
Answer: 9
Step-by-step explanation:
If we add 10 plus 3 that equals 13 and then we multiply that by 7 because of the pemdas rule that equals 91. then we subtract 91 by 82 and that equals 9.
Hope This Helps! :P
A construction worker uses a tape measure to find that a pipe is
28/100
of a meter long. Select the decimal that represents the same length.
a 1.28 m
b 2.8 m
c 0.28 m
d 0.028 m
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Answer:
the answer is c 28 dived by 100 = 0.28
Step-by-step explanation:
Judah rides his bike 15 miles in 1/2 an hour. How many miles does he ride in one hour?
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Answer:
30
Step-by-step explanation:
15=30
x=60
cross multiply
30×x=60×15
30x=900
x=30
so Judah rides his bike 30 miles in one hour
Answer:
30 miles
Step-by-step explanation:
multiply 15 miles by 2 and 1/2 by 2 to get 30 miles an hour.
true or false signals from the peripheral devices are carried to CPU a long control bus circuits
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Answer: true
Step-by-step explanation: