Math, asked by anirhea14, 1 year ago

Cos 3A. (2 sin 2A-1) = 0

Answers

Answered by anupdubey94

3

Answer:

cos3a=0

sin(90-3a)=0

3a=90

2sin2a=1

2a=1/2=30

a=30/2=15

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