4. or

8. Keyword: Use Double Angle Formulas

10. Keyword: Use Pythagorean Identities

14. Keywords: Break into a single sine term and the left-over terms; Then use a Pythagorean Identity on the left-over terms.

15. Keywords: Break into a single cosine term and the left-over terms; Then use a Pythagorean Identity on the left-over terms.

16. Keywords: Break into a tangent squared term and the left-over terms; Then use a Pythagorean Identity on the tangent squared term.

17. Keywords: Break into a cotangent squared term and the left-over terms; Then use a Pythagorean Identity on the cotangent squared term.

18. Keywords: Special use of Integration by Parts

20. Keywords: Use Double-Angle Formulas twice

22. Keywords: Break in to a tangent squared term and the left-over terms. Use Pythagorean Identity on the tangent squared term

23. Keywords: Break in to a cotangent squared term and the left-over terms. Use Pythagorean Identity on the cotangent squared term.

24. Keywords: Break in to a secant squared term and the left-over terms. Use Pythagorean Identity on the left-over terms.

25. Keywords: Break in to a cosecant squared term and the left-over terms. Use Pythagorean Identity on the left-over terms.

26. Keywords: Break into a single sine term and the left-over terms; Then use Pythagorean Identity on the left-over terms.

27. Keywords: Break into a single cosine term and the left-over terms; Then use Pythagorean Identity on the left-over terms.

28. Keywords: Break into a tangent squared term and the left-over terms; Then use Pythagorean Identity on the tangent squared terms.

29. Keywords: Break into a cotangent squared term and the left-over terms; Then use Pythagorean Identity on the cotangent squared term.

30. Keywords: Special use of Integration by Parts