MathematicsMedium179×since 2002Q4142If f : R →\to→ R is a function defined by f(x)= [x - 1] cos(2x−12)π\cos \left( {{{2x - 1} \over 2}} \right)\picos(22x−1)π, where [.] denotes the greatest integer function, then f is :Acontinuous for every real xBdiscontinuous at all integral values of x except at x = 1Cdiscontinuous only at x = 1Dcontinuous only at x = 1Check answerSkip