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How do I evaluate cos 4π/3?

How do I evaluate cos 4π/3?
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3 votes
How do I evaluate cos 4π/3?

User Latesha
by
7.7k points

2 Answers

2 votes

Answer:

Explanation:


cos ((4 \pi )/(3) )=cos (\pi +(\pi )/(3) )=-cos ((\pi )/(3) )=-(1)/(2)

User Nickjb
by
8.4k points
1 vote

Answer:

-1/2

Explanation:

cos (4π/3)= cos (π+π/3)

User Rubans
by
8.5k points
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