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If x =secϴ–cosϴ and y =secnϴ–cosnϴ then show that, (x2+4)(dy/dx)2 =n2(y2+4)

If x =secϴ–cosϴ and y =secnϴ–cosnϴ then show that, (x2+4)(dy/dx)2 =n2(y2+4)

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