b)` int cos(a+x)dx`

int cos(ln x)dx

int(x cos x)dx

Integrate : (b) int ( cos 2x)/( cos x - sin x) dx,

int cos x dx = …….

int cos x cos3x*dx

underset then B=int cos(x-b)dx=A log|sec(x-b)|+Bx+C

Find the following integrals: ( i ) int(sin x+cos x)dx( ii) int cos ecx(cos ecx+cos x)dx( iii) int(1-sin x)/(cos^(2)x)dx

(b) int( sin x)/(cos^(2)x)dx