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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
Expert's answer
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Yqn8+nWeJ3NijyLzLmxq8N2P+idjUw5+T3xX0Nlps+1xJv2GaWTc5fH3CwdKhS+Jic/NXXnSfqxsXWhEQSZ8znLp6cvw4nssovk87JT4rsGfr+tN7Aj68DB41tN13AoBvzPqMCAAlIHBgHEgfGgcSBcSBxYBxIHBgHEgfGgcSBcSBxYJz/9dmR6+H/YwkAAAAASUVORK5CYII=

So cos2x must be equal to 1 hence cosx=±1 and sinx=0
X=2k*pi, k∈Z

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