1.

If cosy=xcos(a+y)" with "cosa!= +-1, then dy/dx is equal to

Answer»

1.`(sina)/cos^(2)(a+y)`
2.`cos^(2)(a+y)/(sina)`
3.`(cosa)/(sin^(2)(a+y))`
4.`cos^(2)(a+y)/(cosa)`

ANSWER :B


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