1.

The set S_(1) and S_(2) are solution sets of (1 + a) cos theta cos ( 2 theta - b)= (1 + a cos 2 theta ) cos (theta - b)

Answer»

`{N PI , n in A} and (1)/( 2) {n pi + (-1)^(n) SIN ^(-1) (a sin b) + b, n in Z}`
`{n(pi)/(2), n in Z} and { n pi + (- 1)^(n)sin ^(-1) ( a sin b) , n in Z}`
`{n (pi)/( 2), n in Z} and {n pi + ( - 1)^(n) sin^(-1) ((a)/( 2) sin b) , n in Z}`
None of these

Answer :A


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