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4-40.

If sin θ = and θ , find cos θ and tan θ. Homework Help ✎

Draw and label a right triangle in the correct quadrant.

Calculate the length of the unknown side.
(Or you may know it because it is a Pythagorean Triple!) When you label it, think about if it should be positive or negative.

From the side lengths, you can find the cos(θ) and the tan(θ).