Use the given information to find (a) sin (s+ t), (b) tan (s + t), and (c) the quadrant of s+t. 15 and cos t= 17 4 s and t in quadrant II coss= - ..... (a) sin (s + t) D (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

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A: Answer is given in next step.

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Q: (a)     ? = sin−1       (b)     ? = cos−1       (c)     ? = tan−1

A: asinθ=1215θ=sin-1(1215)θ=53.13ob)cosθ=915θ=cos-1(915)θ=53.13o

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A: Given: 1-tan2x1+tan2x We write tan x by using the ratio of sin x and cos x.

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A: We use Trigonometry identities

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A: sinx = -817   , in iii quadrant, hence, cosine will also be negative, hence, cosx = -1-sin2x =…

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A: Solve the function

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A: We will use the double angle formula to find cos2A

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A: The detailed solution is given below Thank you

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