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If 0 lt theta lt pi, solve cos theta.cos...

If `0 lt theta lt pi`, solve `cos theta.cos 2 theta cos 3 theta = (1)/(4)`.

Text Solution

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The correct Answer is:
`{(pi)/(8), (pi)/(3), (3pi)/(8),(5pi)/(8),(2pi)/(3),(7pi)/(8)}`
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