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(co|t^2x)/(1-sin^2x)
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(co|t^2x)/(1-sin^2x)

User Pentzzsolt
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hello :
cot(x) = cos(x)/sin(x) .... cot²(x) = cos²(x)/sin²(x)
1-sin²(x) = cos²(x)
cot²(x)(1-sin²(x)) = ( cos²(x)/sin²(x))× cos²(x) = 1/sin²(x)

User Sanwuwy
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