Evaluate the integerals.
`int (sin x cos x)/(cos ^(2)x +3 cos x+2)dx.`

Evaluate the integerals. int (1)/(1+sin x+, cos x) dx

Evaluate the integerals. int (dx)/(5+ 4 cos 2x).

Evaluate the integerals. int cos x cos 2x dx on R.

Evaluate the integerals. int cos x cos 3x dx on R.

Evaluate the integerals. int (cos x)/(si ^(2)x +4 sin x+5)dx

Evaluate the integerals. int (1)/(2-3 cos 2x) dx

Evaluate the integerals. int (sin 2x)/(a cos ^(2) x + b sin ^(2)x)dx on I sub R \\ {x in R| a cos ^(2)x +b sin ^(2) x =0}.

Evaluate the integerals. int (1)/(sin x+ sqrt3 cos x)dx

Evaluate the following integrals. int sin x cos x (sin 2x + cos 2x) dx

Evaluate the following integrals. int sin x cos x (sin 2x + cos 2x) dx