Geometry
# Sum and Difference Trigonometric Formulas

\(N\) 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 \(N\)?

Which of the following is equal to \( \cos 6 \theta \cos 2 \theta?\)

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