Solution:
The cosine wave equation is expressed as
[tex]\begin{gathered} y=A\cos(B(x+C)+D\text{ ----- equation 1} \\ where \\ A\Rightarrow amplitude \\ C\Rightarrow phase\text{ shift} \\ D\Rightarrow vertical\text{ shift} \end{gathered}[/tex]Given:
[tex]y=\cos6x\text{ ---- equation 2}[/tex]To evaluate the phase shift, we compare equations 1 and 2.
By comparison, we have
[tex]C=0[/tex]Hence, the phase shift is 0.
