find the values of cos^(-1)(1)

and I know the answer is 0 but I don't know how to get there...

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- July 29th 2009, 11:42 PMaamk23I don't know what this means???
find the values of cos^(-1)(1)

and I know the answer is 0 but I don't know how to get there... - July 30th 2009, 12:03 AMmathaddict
- July 30th 2009, 12:09 AMaamk23
ok thanks so much!