1. Determine sin θ to 3 decimal places if cos θ = 1/2 and θ is an angle in quadrant IV
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Originally Posted by william 1. Determine sin θ to 3 decimal places if cos θ = 1/2 and θ is an angle in quadrant IV Hi William, $\displaystyle \cos \theta =\frac{1}{2}$ in the 4th quadrant should corresponding to a special angel. What is it? If you can find that angle, you should be able to figure out $\displaystyle \sin \theta$.
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