Without using a calculator find all solutions to cos22cos22

Without using a calculator, find all solutions to cos(?)=2??2cos?(?)=22 in the interval 0???2?0???2?. If there is more than one answer, enter your answers as a comma separated list. Your answers should be exact values (given as fractions, not decimal approximations)

Section 7.8AND9.1: Problem 2 Previous Problem List Next (1 point) Without using a calculator, find all solutions to cos(J) = _ in the interval 0 2. If there is more than one answer, enter your answers as a comma separated list. Your answers should be exact values (given as fractions, not decimal approximations). = 0, 2pi help (angles)

Solution

cos = sqrt(2)/2

cos = 1/sqrt(2)

solution set is :{/4 , 2 -/4 } = {/4, 7/4 }