Q. 145.0( 2 Votes )

Evaluate the foll

Answer :




We want to put every term in single entity, so multiply by sin x in numerator and denominator,




Substituting cos x = t, dt = – sin x dx




Now,






Now,





Substitute, t = cos x



OR



Since denominator has sin Φ thus for substitution we can substitute cos Φ = t



Now cos Φ = t


Therefore dt = – sin Φ dΦ







Substitute t = cos Φ



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