Trigonometric Identities for Integration

Rarely Tested
Use identities to simplify:
  • $$ \sin^2 x = \frac{1 - \cos 2x}{2} $$
  • $$ \cos^2 x = \frac{1 + \cos 2x}{2} $$
  • $$ \sin^3 x = \frac{3 \sin x - \sin 3x}{4} $$
  • $$ \cos^3 x = \frac{3 \cos x + \cos 3x}{4} $$
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