Match the graph with the correct equation.Choose the one alternative that best completes the statement or answers the question. –

Match the graph with the correct equation.Choose the one alternative that best completes the statement or answers the question.

A) y = cos 3x cos (-3) + sin 3x sin (-3)
B) y = cos 3x cos (-3) – sin 3x sin (-3)
C) y = sin 3x cos (-3) – cos 3x sin (-3)
D) y = sin 3x cos (-3) + cos 3x sin (-3)

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