# How do I find the value of cos (3Pi/2)?

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28
Sep 5, 2015

$\cos \left(\frac{3 \pi}{2}\right) = 0$

#### Explanation:

You can calculate it using reduction formula.

$\cos \left(\frac{3 \pi}{2}\right) = \cos \left(2 \pi - \frac{\pi}{2}\right) = \cos \left(\frac{\pi}{2}\right) = 0$

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