Question

( f(x)=cos left[frac{pi^{2}}{2}right] x+sin left[frac{-pi^{2}}{2}right] x )
( =cos 4 x-sin 5 x )
( f(0)=1 )
( f(pi)=1-0 Rightarrow f(pi)=1 )
( (pi) )

# 15 (x) = cos 2* + sinx, where [:) = COS denotes the greatest integer function, then which of the following is not correct (A)f(0) = 1 (B);(6- 13+1 (D)f(1) = 0

Solution