# How do you evaluate #arccos (1/2)#?

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Nghi N.
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Jun 9, 2015

#### Answer:

Find arccos (1/2)

#### Explanation:

Trig Table gives:

Trig unit circle gives another arc x that has the same cos value (1/2):

x = - 60 deg, or x = 360 - 60 = 300 deg

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