Home > PC > Chapter 4 > Lesson 4.3.2 > Problem4-138

4-138.

Cosine is the x-value. Where on the unit circle is x = 1?

What θ gives a tangent of 1 or −1?
What quadrants would the tangent be −1?

Change the csc θ to 1/sin θ.

$\frac{1}{\cos\theta}=\frac{\sqrt2}{1}$