Find the exact value of cos 120° in simplest form with a rational
denominator.
1 answer:
Given:
cos 120°
To find:
The exact value of cos 120° in simplest form with a rational denominator.
Solution:
We have,
It can be written as
Therefore, the exact value of cos 120° is .
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what is the question? i guess c=5 because 20 divided by 4 = 5 if thats what you mean
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