How do you evaluate cos^(-1) [cos((-5pi)/3)]cos−1[cos(−5π3)]?
2 Answers
Explanation:
Let
Explanation:
Here's the trick to this problem:
So, what this problem is asking us to do is find the angle between
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Adding
cos((-5pi)/3) = cos((-5pi)/3 + 2pi)
cos((-5pi)/3) = cos(pi/3)
And since
cos^-1(cos((-5pi)/3)) = pi/3
Final Answer