For the equation below, solve for the following. Use a calculator to approximate all answers to the nearest hundredth. (Enter your answers as a comma-separated list. If there is no solution, enter NO...

For the equation below, solve for the following. Use a calculator to approximate all answers to the nearest hundredth. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.)
cos x = −0.1810
(a) all radian solutions (Let k be any integer.)
x =

(b)
x if 0 ≤ x <>