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If x = (1-cos^2 theta)/(cos theta), y = ...

If `x = (1-cos^2 theta)/(cos theta), y = (1-cos^(2n)theta)/(cos^n theta)` then show that `(dy/dx)^2 = n^2((y^2 + 4)/(x^2 +4))`

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USHA PUBLICATION-MODEL QUESTION SET-MODEL QUESTION SET
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