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May 26, 2015

Homework Help: trig

Posted by Charles on Monday, September 5, 2011 at 7:27pm.

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function.

Sec^-1(-2)

I got 2pi/3
could someone tell me if that is right? And if not, could someone please explain how to get the answer.

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