# Thread: Express as a trigonometric function of one angle

1. ## Express as a trigonometric function of one angle

cos13cos50 - sin13sin50

the integers are in degrees. not radians.

2. Originally Posted by GUNSLINGAZ
cos13cos50 - sin13sin50

the integers are in degrees. not radians.

$cos(A+B) = \cos(A) \cos(B) - \sin(A) \sin(B)$

Can you express your question in terms of $\cos(A+B)$ now?

3. oh yeah! thanks! i can do it now.

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# express the trigonometric function in one angle

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