Answer step 5

\fStep 4 Since cosine has period 2H, we rst nd the solutions in the interval [0, 2n). For the rst equation, cosm} = %, the solutions in [I], 27:) are as follows. TE 9=IE 511: 91. E For the second equation, cos{|5') = 1, the solution in [0, 23:} is as follows. i El Because the cosine function repeats its values every 2?: units, we get all solutions of the equation by adding integer multiplies of 23'! to the solutions found in the previous steps. Thus, if we let k be any integer, we add 2m to each of the three solutions and enter them as a comma-separated list. (Enter your answers as a commaseparated list.) Submit Skip {you cannot oome back) Need Help? Submit Alwer