Tutorial Exercise Solve the given equation. 2 sin2(0) - cos(0) = 1 Step 1 First, recall that sin (0) = 1 - cos?(0). Thus, substitute (1 - cos2(9)) for sin2(0) in the given equation. Then, simplify. 2 sin2(0) - cos(0) = 1 2(1 4 1 - cos2 (8) ) - cos ( 8 ) = 1 2 - 2 0 2 cos2(0) - cos(0) - 1 = 0 - 2 0 -2 cos2(0) - cos(0) + 1 = 0 Step 2 Treat the resulting equation as a quadratic in sec(0) and factor the left side of the equation. -2 cos2(0) - cos(0) + 1 = 0 2 cos (0) + cos(0) - 1 = 0 (2 cos(0) - 1)( = 0 Submit Skip (you cannot come back) Need Help? Read It5. [112 Points] PREVIOUS ANSWERS SPRECALC? 7.5.019. An equation is given. (Enter your answers as a commaiseparated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.) 2 cosEZB) 1 : U (a) Find all solutions of the equation. It 511 a: 6+1tk, 6 +nk I (b) Find the solutions in the interval [0, 2n). 9: Need Help? 6. [112 Points] PREVIOUS ANSWERS SPRECALC? 7.5.023. An equation is given. [Enter your answers as a commaiseparated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.) cos[) 1 = I] 2 (a) Find all solutions of the equation. 9 = 41:]: cl (b) Find the solutions in the interval [0, 2n]. a: Need Help? SulmitAmwer