Question

Which of the following options represents the graph of F(x) = coscos(x-)?

Answer 1

Simplify the expression.

`\begin{gathered} F(x)=\cos ((1)/(2)x-(3\pi)/(2)) \\ =\cos ((3\pi)/(2)-(1)/(2)x) \\ =-\sin ((x)/(2)) \end{gathered}`

Plot the function -sin (x /2).

So correct option is Option D.