Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given
Parabola has x-intercept has
and 
and Y-intercept as 
Now the general equation of parabola is

Substitute
in
we get

Now substitute
in equation 

Now substitute
in equation 

Solving
and
we get

therefore


The correct answer would be C) 3%
-π/2 < arctan(x) < π/2
So cos(π/2) < cos(arctan(x)) < cos(0)
0 < cos(arctan(x)) < 1