Question

As θ increases, the value of cos θ increase, decreases or stays the same?

Answer 1

As θ increases, the value of cos θ decreases

Explanation:

As as θ increases, the value of cos θ decreases from 1 to -1 in the first two quadrants ( between 0 and 180 degrees). Cos(0) = 1, cos(90) = 0, cos(180) = -1.

On the other hand, as θ increases from 180 to 360 degrees (last two quadrants) the value of cos θ increases from -1 to 1.

Check the attachment below: