Question

What are the domain, range, and midline of the function f(x)=1/2cos(1/4x)-1?​

Answer 1

Your function is:
`f(x)=(1)/(2)\cos \Big( (1)/(4x)\Big) -1`

Domain: $(-\infty, +\infty)-\{ 0 \}$ or $R-\{ 0 \}$

Range: $[-\frac{3}{2}, -\frac{1}{2}]$

Midline: $y=-1$