# If sin A=, then the value of cot A isA. B. C. D. 1

Given: … eq. 1

And we know that, …eq. 2

We need to find the value of cos A.

…eq. 3

(, sin2 θ +cos2 θ =1

cos2 A = 1-sin2 A

cos A = √ (1-sin2 A)

Substituting eq. 1 in eq. 3, we get

cos A = √(1-1/4)

=

Substituting values of sin A and cos A in eq. 2, we get

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