" 19."(" i) "int(sin^(2)x)/(cos^(4)x)dx

int(sin x)/(cos^(4)x)dx

I=int(sin^2x)/(1+cos x)dx

" 4.(i) "int(sin x)/(1-sin^(2)x)dx

int(1)/(sin^(2)x-4 cos^(2)x)dx

int(1)/(sin^(2)x-4 cos^(2)x)dx

Evaluate : (i) int(cos2x+2sin^(2)x)/(sin^(2)x)dx (ii) int(2cos^(2)x-cos2x)/(cos^(2)x)dx

Evaluate: (i) int sec^(2)(7-4x)dx (ii) int(1)/(sin^(2)x cos^(2)x)dx

int (sin x cos x)/(1+cos^(4)x)dx=

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