SOLUTION: Hi, please help me with this problem: What is the exact value of cos(arccos (-1/2)) Thanks!!

SOLUTION: Hi, please help me with this problem: What is the exact value of cos(arccos (-1/2)) Thanks!!

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Question 409940: Hi, please help me with this problem:
What is the exact value of cos(arccos (-1/2))
Thanks!!
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Cosine and arccosine are inverse functions, so .
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