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Solve : cos 3x. Cos^(3)x+sin 3x.sin^(3)x...

Solve : `cos 3x. Cos^(3)x+sin 3x.sin^(3)x=0`

Text Solution

Verified by Experts

The correct Answer is:
`x=npi pm pi/4 n in I ` or `x=m pi/2 pm pi/4`
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