*2." i) "int(1)/(1+cos^(2)x)dx

int1/(1+cos^(2)x)dx=

int1/(1+cos^(2)x)dx=

int(1)/(1-cos 2x) dx

int(1)/(1-cos 2x) dx

int(1)/( 1+cos 2x ) dx

int(1)/( 1+cos 2x ) dx

Evaluate: (i) int(1)/(1+cos2x)dx (ii) int(1)/(1-cos2x)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

int 1/(1+cos2x)dx=

(i) int(1)/((1+cos2x))dx , (ii) int (1)/((1-cos2x)) dx