CPM Homework Help : PC3 Problem 5-69

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Home > PC3 > Chapter 5 > Lesson 5.2.2 > Problem 5-69

5-69.

If $\sin(θ)=\frac{2}{3}$ and $\frac{\pi}{2}\leθ\le\pi$ , what is $\cos(θ)$ ?

Step 1:

Draw a triangle diagram and label known sides.

Step 2:

Determine the length of the missing side.

Step 3:

Evaluate $\cos\left(θ\right)$ . What sign should be used?

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