The solution of sin2x-2sinx + cosx-1 = 0

The solution of sin2x-2sinx + cosx-1 = 0

Sin2x-2sinx + cosx-1 = 2sinxcosx-2sinx + cosx-1 = (2sinx + 1) (cosx-1) there is only x = 0. I don't want to say more about this problem. I believe you are the one with poor foundation. I suggest that you pay more attention to the change of factorization in the future, and practice more when learning trigonometry. Mathematics can be improved quickly through efforts, but