Question

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

Answer 1

Your function is: $f(x)=\frac{1}{2}\cos \Big( \frac{1}{4x}\Big) -1$

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

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

Midline: $y=-1$

Answer 2

I’m not sure but next time a picture of the question might help!