Q29 of 865 Page 20

Evaluate the following integrals:

Assume 1 + cosx = t


⇒ d(1 + cosx) = dt


⇒ - sinx.dx = dt


Substituting the values oft and dt we get


⇒


⇒


⇒


⇒


But t = 1 + cosx


⇒


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