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Molodets [167]
3 years ago
13

What is the exact value of cos 2π/3.

Mathematics
2 answers:
lora16 [44]3 years ago
4 0
The problem ask to calculate the exact value of the expression or trigonometric expression that is stated in you problem. Base on following some theories and rules about solving trigonometric expressions, the value of cos 2pi over 3 would be -1/2. I hope you are satisfied with my answer and feel free to ask for more 
nignag [31]3 years ago
3 0
Cos 2(phi)/3= cos 120°= -cos 60°= -1/2
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