Solve the equation Enter your answers as a commaseparated li

Solve the equation. (Enter your answers as a comma-separated list. Use n as an integer constant. Enter your response in radians.) 16 cos^2 x - 4 = 0

Solution

16 cos²x - 4 = 0

16 cos²x = 4

cos²x = 1/4

cos x = 1/2

cos x = cos (pi/3)

[ if cos x = cos y then x = 2*n*pi +- y , n -an integer ]

x = 2*n*pi +- (pi/3)