Question: Rewrite each expression with a single sine or cosine. a. cos 1.5 cos 0.4 + sin 1.5 sin 0.4 b. cos 2.6 cos 0.2 -

Rewrite each expression with a single sine or cosine.
a. cos 1.5 cos 0.4 + sin 1.5 sin 0.4
b. cos 2.6 cos 0.2 - sin 2.6 sin 0.2
c. sin 3.1 cos 1.4 - cos 3.1 sin 1.4
d. sin 0.2 cos 0.5 + cos 0.2 sin 0.5

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