Asked by caitlyn

cos94 degrees cos18 degrees+ sin94 degrees sin18 degrees.

write the expression as the sine, cosine, or tangent of an angle.
Answered by Reiny
use the identity:
cos(A-B)= cosAcosB + sinAsinB

cos94°cos18° + sin94°sin18° = cos(94-18) = cos 76°
Answered by caitlyn
is that the answer?
Answered by Reiny
yes, check it out with a calculator.

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