3. Prove the following 1+sing 1-sing = sec 0 + tan 0 (5 pts) b. cos 3x = 1-3 tan x sec3 x (5 pts) sin 2x c. sec x = COS 2x + cosX sinx (5 pts) d. tan x = csc 2x - cot 2x (5 pts) 4. Given the following function: 2 cos(3x + 3) + 1 (a) Plot one period of the function on Page 1. Label each point properly. (5 pts) (b) Determine: amplitude, period, frequency, phase shift, and vertical shift. (5 pts) 5. Given that sec 0 = v5 where -"