SOLUTION: How does sec(cos^(-1) 1/2) equal to 2? I know that cos 1/2 is at 60 degrees and 300 degrees, where do I go from there?

SOLUTION: How does sec(cos^(-1) 1/2) equal to 2? I know that cos 1/2 is at 60 degrees and 300 degrees, where do I go from there?

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Question 432637: How does sec(cos^(-1) 1/2) equal to 2? I know that cos 1/2 is at 60 degrees and 300 degrees, where do I go from there?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
You do not even need to evaluate . The expression is equivalent to . Since cosine and arccosine are inverse functions, the end result is the argument of the function, or 1/2. Hence, it is equal to , or 2.
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