Determine whether the statement is true or false.
-cos(30°+ 45°)= cos 30° · cos 45° - sin 30° · sin 45°

Name: Determine whether the statement is true or false. -cos(30°+ 45°)= cos 30° · cos 45° - sin 30° · sin 45°
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Question

Quizplus · Accepted Answer

This statement is true because it is an application of the cosine addition formula, $\cos(A + B) = \cos A \cdot \cos B - \sin A \cdot \sin B$, where $A = 30°$ and $B = 45°$.

Determine Whether the Statement Is True or False