# Answer to Question #4291 in Trigonometry for lissa

Question #4291

please hepl me solve this question

(1+1/tan^2x)(1+1/cot^2x)=1/sin^2x-sin^4x

(1+1/tan^2x)(1+1/cot^2x)=1/sin^2x-sin^4x

Expert's answer

So cos

^{2}x must be equal to 1 hence cosx=±1 and sinx=0

X=2k*pi, k∈Z

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