Integrate cos 2 x dx from 0 to pi 4

- Integrate cos 2x sin x cos x 2 dx from 0 to pi 4
- Integrate sin 4 x * cos 2 x dx from 0 to pi 2
- Integrate sin x cos x )/( 3 sin 2x dx from 0 to pi 4
- Integrate sin 2x )/( sin 4 x cos 4 x dx from 0 to pi 4
- Integrate sin 4 x cos 4 x dx from 0 to pi 2 k
- Integrate sin 4 x * cos 3 x dx from 0 to pi 2
- Integrate sin 4 x cos 6 x dx from 0 to pi 2
- Integrate (cos^2x)/(cos^2x + 4sin^2x) dx from 0 to pi / 2
- Integrate sin 4 x * cos 5 x dx from 0 to pi 2
- Evaluate integrate (sin^4x)/(sin^4x + cos^4 x) dx from 0 to pi/2