solve for cosx(cosx-1)=0

Question

Solve for. Cosx(cosx-1)=0

Answer 1

cos x (cos x - 1) = 0

 

cos x = 0                 or       cos x - 1 = 0

{π/2, 3π/2}              or       cos x = 1

                                         {0, π}

 

(0, π/2, π, 3π/2}