Is this product to sum identity correct? $$\text{cos}{(\frac{5\pi}{3})}\text{sin}{(\frac{5\pi}{6})} = \frac{1}{2} \left[ \text{sin}(\frac{5\pi}{3} + \frac{5\pi}{6}) - \text{sin}(\frac{5\pi}{3} - \frac{5\pi}{6}) \right] $$

Trigonometry Identities - Product to Sum Identity True/False (Radians)

Level 1

The topics in this unit focus on mastering the basic trigonometric identities. Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Trigonometry Identities - Product to Sum Identity True/False (Radians)

Is this product to sum identity correct?

\text{sin}{(\frac{5\pi}{6})}\text{sin}{(\frac{7\pi}{4})} = \frac{1}{2} \left[ \text{cos}(\frac{5\pi}{6} + \frac{7\pi}{4}) + \text{sin}(\frac{5\pi}{6} + \frac{7\pi}{4}) \right]

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