Question

cos 3 A*(2sin2A-1)=0 find the value of A ​

Answer 1

Answer:

cos3A.(2sin2A−1)=0

cos3A=0 or 2sin2A=1

3A=90 or 2A=30

A=30∘ or A=15∘

Thus, A=30∘,15∘

Step-by-step explanation:

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