CPM Homework Help : PC Problem 6-30

If sin θ = and ≤ θ ≤ π, find cos θ. You will need a unit circle diagram or a sketch of the graph of y = sin x, in addition to the Fundamental Pythagorean Identity, to help you answer this. Homework Help ✎

Step 1:

Draw a triangle diagram and label known sides.

Step 2:

Determine the length of the missing side.

Step 3:

Evaluate cos(θ). What sign should be used?