Question

if sin²A =0 , find cos A​

Answer 1

Step-by-step explanation:

1- sin²A= cos²A

1-0=cos²A

cos A= 1

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Answer 2

sin²A =0

=>sin A=0

=>sin A=sin 0 (As sin 0=0)

=>A=0

Thus,cos A=cos 0=1