Point (m, n) is the point of intersection of the terminal arm of angel theta in standard position and the unit

Point (m, n) is the point of intersection of the terminal arm of angel theta in standard position and the unit circle centred at (0, 0) Determine the value of Cos theta?
A) m B) n C) (m+n)/2 D) (m-n)/2

cos θ = m/1 = m

A