Question

express cosA in terms of sinA​

Answer 1

Answer:

cos2A = sin2A - 1

cos A = √ sin 2A - 1

here 2 is square

Step-by-step explanation:

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Answer 2

sintheta = cos thetha

costhetha = -sinthetha

integrate the expression cosA in term of sinA

In integration ,

cos thetha = sin thetha

that it's, cosA = sinA