Determine a general formula or formulas for the solutions to

Determine a general formula (or formulas) for the solutions to the following equation. Then, determine the specific solutions (if any) on the interval (0. 2 pi). costheta = -1/2 Describe in the most concise way possible the general solution to the given equation, where k is any integer. Select the correct choice below and till tn all the answer boxes within your choice.

Solution

cos =-1/2

so in [0,2pi] the   value is 2pi/3 , 4pi/3

so the general solution is : +pi/3 + 2kpi or -pi/3 +2kpi where k is an integer