1.

If x=sectheta-costhetaandy=sec^(n)theta-cos^(n)theta, then (x^(2)+4 )((dy)/(dx))^(2) is equal to

Answer»

`N^(2)(y^(2)-4)`
`n^(2)(4-y^(2))`
`n^(2)(y^(2)+4)`
None of these

Answer :C


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