Question

Pls help- the question kept cutting off before:

If cos(πr) = 2 cos(πr) and 0 < r < 3, what is one possible value of r?

Answer 1

r can be 0.5

Explanation:

Here, we want to get a possible value of r

From the question, the value of r is between 0 and 3

Mathematically, we know that in degrees pi is the same as 180 degrees

In a case where we have r = 1/2

we have it that;

cos(pi/2) = 2 cos (pi/2)

Since pi/2 is 90 and cos 90 is zero; then we have it that the two sides of the equation is the same and r can be 1/2