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# What is the exact value of sin(-pi/12) ?

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1.What is the exact value of sin(-pi/12) ?

-squ(3) -1   /   2squ(2)

2. What are the solutions of the equation 2sin (4x)=1   on the interval [0, pi)?

x=5pi/24

3. A 30-foot ramp is used to move product to a loading dock. The ramp makes a 24° angle with the horizontal. The ramp is to be replaced with a ramp that is 50 feet long. What angle does this replacement ramp make with the horizontal? Round your answer to the nearest tenth of a degree.

14.1 degree

Apr 2, 2020
edited by KASI20W  Apr 2, 2020
edited by KASI20W  Apr 2, 2020

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Apr 2, 2020
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What about the others are they correct??

Apr 2, 2020
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sin 4x = 1/2

4x = pi/6    and   5pi/6       now divide by 4 to find x

Apr 2, 2020
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Do i divide 5pi/6 by 4? And thanks for the help! :)

KASI20W  Apr 2, 2020
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Yes you divide both sides of the equation by 4      so     pi/6  would be divided by 4 also

ElectricPavlov  Apr 2, 2020
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I know i have asked many questions but is it correct?

2.1 for pi/6 and 10.5 for 5pi/6

KASI20W  Apr 2, 2020
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You MULTIPLIED by 4......you need to DIVIDE by 4

4x = pi/6    divide by 4

x = pi/24

4x = 5pi/6    divide by 4

x = 5pi/24

ElectricPavlov  Apr 2, 2020
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3.   I got 14.1o    like you did..... good work !       (or we BOTH got the wrong answer...haha)

Apr 2, 2020