Posts

Showing posts from December 14, 2018

Evaluating $int frac {3cos x}{(2sin x-5cos x)},dx$

Image
up vote 0 down vote favorite $$int dfrac {3cos x}{(2sin x-5cos x)},dx$$ I've been thinking and trying to work this out in quite a few ways: 1)Taking conjugate which actually complicates it further 2)Using half angle formula to convert the expression in terms of tan but I get 2 terms in the integration of which I'm unable to integrate 1 term because I can't seem to be able to make a suitable substitution. 3)Dividing throughout by $cos^2 x$ I find none of these methods to be effective. Please advice. calculus integration share | cite | improve this question edited Nov 22 at 14:58 StubbornAtom ...