Math miscellaneousHard

Question

dx is equal to

Options

A.

B.

C.

D.

Solution

= (cosx)^-2005 .-cotx - (∫2005)(cosx)^-2006 . - sin x(-cot x) dx - 2005∫cos^-2005x dx
=

+ 2005 ∫cos^-2005x dx - 2005 ∫cos^-2005 x
=

+ C

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