If cos theta + cos 3 theta - 2 cos 2 the...

If `cos theta + cos 3 theta - 2 cos 2 theta = 0, " then " theta ` =

A

`(2 n + 1) (pi)/(4), 2 m pi, m, n in Z`

B

`(n pi)/(4), m pi, n, m in Z`

C

`(2 n +1) (pi)/(3), 2 m pi, n, m in Z`

D

`(2 n + 1) (pi)/(6) , m pi, n, m in Z`

लिखित उत्तर

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The correct Answer is:

A

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