Math, asked by ifrahzameer4880, 1 year ago

If cos 3A=0 and A is a acute, find value of cos 2A

Answers

Answered by Shreyaa1235

1

cos 3A= 0

We know ,cos 90°=0

⇒3A=90°

A=30°

2A=60°

∴ 2A is 60°.

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