Question: Simplify. 1) cos 40cos 50-sin 40sin 50 B) sin-0 A) cos 0 C) cos 90 D) cos 30 2) sin-3ucos 3u- cos-3usin 3u A)

Simplify. 1) cos 40cos 50-sin 40sin 50 B) sin-0 A) cos 0

Simplify. 1) cos 40cos 50-sin 40sin 50 B) sin-0 A) cos 0 C) cos 90 D) cos 30 2) sin-3ucos 3u- cos-3usin 3u A) sin 3u C) sin-6u B) cos-6u D) sin 7u

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