1.

Let f(x)=(sinx+3sin3x+5sin5x+3sin7x)/(sin2x+2sin4x+3sin6x), wherever defined. If x_(1)+x_(2)=(pi)/(2), where f(x) is defined at x_(1) and x_(2), then f^(2)(x_(1))+f^(2)(x_(2)) is

Answer»

`COS^(2)X`
`SIN^(2)x`
4
1

Answer :C


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