Question

Solve the equation in radians for all exact solutions where appropriate. Round approximate answers to four decimal places. Write answers using the least possible nonnegative angle measures. 2 sin 2x + sin x - 1 = 0 Choose the correct answer below. 51 O A. The solution set is ola + 2n, 6 Зл + 2n, 2 +2nt, where n is any integer 6 51 OB. The solution set is Ala +21. 6 + 2n, 31 2 +2nt, where n is any integer OC. The solution set is Al +261. 6 71 Зл +2nt, 2 +2nt, where n is any integer D. The solution set is + 2nt, 710 6 + 2n, 31 2 + 2na, where n is any integer)

Answer 1

classmate Date Page Given 2 sin²x + sinx-1=0 It is a quadratic equation in sina 2 sin²x +2sina-sinx-1=0 product=-2 sum = 1 2 sinx (sinx+1)-1(Sina+i)=0 two numbers 2,(-1) 2 Sin-1=0 sinato 2 sina=1 sina = -1 sind = 1 2 x-siñ (-1) x= Bin (2) x = 3T 2 x= I or 55 GoS = 2n1+31 @ G.S - 2nIt to and an +5T +57 ① and 2 Althe combining The solution set is { F +2017, 5T +211, 314209, Where is any integer} Answer: A