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Which of the following functions have the same period ?A. `f(x)=sin^(2)(x) +cos^(4)x+2`B. `g(x)=(1)/(f(sin x))+(1)/(f(cos x))` where `f(x)=(1)/(sqrt(1-x^(2)))`C. `h(x)=(|sin x|+|cos x|)/(|sinx-cosx|)`D. `k(x)=cos(cos x)+cos(sin x)` |
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Answer» ABD A,B,D each have a period `pi//2`, and C has a period `pi` |
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