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Trig-e

Calculus Level 3

\[ \large \int\cos(2x) \sin(5x) \, dx= \, ? \]

Assume we ignore the arbitrary constant of integration.

\[ \frac{1}{2} \, \sin(3x) + \frac{1}{2} \, \sin(7x) \] \[ -\frac{1}{2} \, \sin(2x) - \frac{1}{5} \, \sin(5x) \] \[ \frac{1}{10} ( \sin(2x) \, \cos(5x) - \cos(2x) \, \sin(5x) ) \] \[ -\frac{1}{6} \, \cos(3x) - \frac{1}{14} \, \cos(7x) \]

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by Brandon Stocks

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