the answer for this question is ( d)
They are both periodic functions that look like waves. They both have a period of 2pi and oscillate between 1 and -1.
For this case we have the following equation:

Deriving we have:

We match zero:

We clear the value of x:

Then, we substitute the value of x in the equation of the parabola:

Thus, the vertex of the parabola is the ordered pair:
Answer:
The vertice is:
Ten and seventy-three hundredths
Use a calculator bruhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh