Use a calculator to solve the following equation in the interval [0, 20 correct to five decimal places. sin?
4sin^2 (x) - 2 = 0 a. 0.78540, 2.35619, 3.92699, 5.49779 b. - 0.78540, 0.78540, 2.35619, 3.92699 c. 0.78540, 2.35619, 3.92699, 5.49779, 7.06858 d. 0.78540, 2.35619