Kayleigh G.

asked • 11/23/22

If sina =-7/25 and cosb = 8/17 with 270 < a,b < 360 find the value of sin(a+b)

is the answer -416/425?

Mark M.

Did you use the sum formula?
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11/23/22

Doug C.

This graph shows that your answer is correct. desmos.com/calculator/vxw8zeqeib There are a few different ways to determine the values for cos(a) and sin(b) for angles in quadrant IV which you obviously figured out.
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11/23/22

1 Expert Answer

By:

Raymond B. answered • 11/23/22

Tutor
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Math, microeconomics or criminal justice

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