Integral of 1/cos^2(2x) ❖ Calculus 1

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if tan²y=(1+ cos2x) /(1-cos2x), then find dy/dx

If `y=1/2log((1-cos2x)/(1+cos2x)),p rov et h a t(dy)/(dx)=2cos e c2x`

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If y = (√1 - cos2x)/(√1 + cos2x) , Find dy/dx

Derivative of `sqrt((1-cos2x)/(1+cos2x))`

Integral of 1/cos^2(x) (substitution)

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Integral 1/cos^2(x)

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`lim_(x- gt0)(sqrt((1-cos2x)/2))/x`

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