Question

if sin2 A=0 then find the value of cos A.
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Answer 1

Answer:

1/√2

Step-by-step explanation:

sin 2A = 0 = sin 90°

=> 2A = 90

=> A = 45°

So, cos A = cos 45° = 1/√2

Answer 2

the anser is √3/2

Step-by-step explanation:

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