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

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.

PracticeWorksheetView

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

Is this product to sum identity correct?

cos(β)cos(α)=12[cos(β+α)+cos2(β+α)]\text{cos}{(\beta)}\text{cos}{(\alpha)} = \frac{1}{2} \left[ \text{cos}(\beta + \alpha) + \text{cos}^2(\beta + \alpha) \right]

?