Single Answer MCQ
Q-00051653
If x = 60°, what is the value of cos(2x)?
1
1/2
2
1
3
0
4
√3/2
Answer and Solution
Answer
A. 1/2
Solution:
cos(120°) equals -1/2, hence cos(2*60°) = cos(120°) = -1/2.
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