Cos2x= check all that apply. a. 1-2sin^2 x. b. 2sin^2 x-1. c. sin^2 x-cos^2 x. d. cos^2 x-sin^2 x

         cos 2 x = cos² x - sin² x = 1 - sin² x - sin² x = 1 - 2 sin² x.
          A ) 1 - sin² x and D ) cos² x - sin² x 
         Thank you.

There is no graph but what i can say is that 1 is the slope and that -2 is the y- intercept