Back to all chapters
# Sum and Difference Trigonometric Formulas

These formulas explain how to add and subtract trigonometric functions (and their arguments). If you've got sum time, see what a difference these formulas will make for your trig toolkit.

\(N\) is an integer in the range \( [0, 180] \) such that

\[ 2 \cos 43 ^\circ \cos 26 ^\circ = \cos 69 ^ \circ + \cos N ^ \circ. \]

What is the value of \(N\)?

×

Problem Loading...

Note Loading...

Set Loading...