1.

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

Answer»

`(2 n + 1) (pi)/(4), 2 m pi, m, n in Z`
`(n pi)/(4), m pi, n, m in Z`
`(2 n +1) (pi)/(3), 2 m pi, n, m in Z`
`(2 n + 1) (pi)/(6) , MPI, n, m in Z`

ANSWER :A


Discussion

No Comment Found