Identify the equation as either an identity or not.
-2 sin 5x cos x = sin 6x + sin 4x
A) Not an identity
B) Identity

Name: Identify the equation as either an identity or not. -2 sin 5x cos x = sin 6x + sin 4x A) Not an identity B) Identity
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Question

Quizplus · Accepted Answer

This equation is an identity because it is an application of the sum-to-product identities in trigonometry. Specifically, it uses the identity sin(a)cos(b) = 1/2[sin(a+b) + sin(a-b)], where a = 5x and b = x, thus simplifying to the given equation.

Identify the Equation as Either an Identity or Not