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

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

int(1)/(1+3 cos^(2) x)dx

int(1)/(1+3 cos^(2) x)dx

int(x)/(1+cos2x)dx

int1/(1+cos^(2)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

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

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