Consider the real-valued function satisf...

Consider the real-valued function satisfying `2f(sinx)+f(cosx)=xdot` then the
(a) domain of `f(x)i sR`
(b) domain of `f(x)i s[-1,1]`
(c) range of `f(x)` is `[-(2pi)/3,pi/3]`
(d) range of `f(x)i sR`

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The correct Answer is:

Domain `in` [-1,1] and range `in [(-2pi)/3,pi/3]`

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