# <span lang="EN-US

Given: cos A = …eq. 1

d we know that tan A =

We have value of cos A, we need to find value of sin A

Also we know that, sin A = √ (1-cos2 A) …eq. 2

(, sin2 θ +cos2 θ =1

sin2 A = 1-cos2 A

sin A = √ (1-cos2 A)

Thus,

Substituting eq. 1 in eq. 2, we get

Sin A =

Therefore,

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