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(Solved): If \( \cos (\theta)=\frac{2}{5} \) and \( \theta \) is in the 4th quadrant, find the exact value fo ...



If \( \cos (\theta)=\frac{2}{5} \) and \( \theta \) is in the 4th quadrant, find the exact value for \( \sin (\theta) \). \[
If \( \cos (\theta)=\frac{2}{5} \) and \( \theta \) is in the 4th quadrant, find the exact value for \( \sin (\theta) \). \[ \sin (\theta)= \]


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