Answer:
[tex]y=cosx[/tex]
[tex]y=cotx[/tex]
Step-by-step explanation:
The trigonometric function;
[tex]y=\cos(x)[/tex] has zeroes at [tex]\frac{n\pi}{2}[/tex] where [tex]n[/tex] is an odd integer.
The trigonometric function; [tex]y=cot x=\frac{cosx}{sinx}[/tex]. This also has zeroes at [tex]\frac{n\pi}{2}[/tex] where [tex]n[/tex] is an odd integer.
