For which values of a and b E R is the following piecewise function continuous on R? ( sin( a + ? ) + a 0 f (ac ) = 1 202 - x- 2 a = 0 1 - cos x x > 0 Select one alternative: O a = -3,b =-3 O There are no such values of a and b O a = -2,b =-2 O a = -3,6 =-2