Write the expression as the sine, cosine, or tangent of an angle. cos 112Á cos 45Á + sin 112Á sin 45Á

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asked Oct 8, 2017 58.5k views

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Write the expression as the sine, cosine, or tangent of an angle.

cos 112Á cos 45Á + sin 112Á sin 45Á

Mathematics
high-school

Viscocent asked

by Viscocent

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The given expression is the expansion of cos (a-b)
so we can simply calculate it as cos(112-45)= cos 67

Gollumullog answered Oct 12, 2017

by Gollumullog

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