The inverse of Cosxis a function. The domain of Cosxcould be ???

How would I find the domain???

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- August 2nd 2010, 03:31 PMMATNTRNGTrigonometric Function
The inverse of Cos

*x*is a function. The domain of Cos*x*could be ???

How would I find the domain??? - August 2nd 2010, 04:11 PMProve It
In order for to have an inverse function, it must be one-to-one.

Draw the function . Can you choose a domain where there aren't any repeating values? - August 2nd 2010, 04:31 PMeumyang
Hmm... I'm assuming that the fact that C is capitalized is significant. I only learned when I was in school, and had never seen until now. Is it a regional/national thing? I'm in the US.

- August 2nd 2010, 04:34 PMProve It
The capitalisation means there has been a standard restriction on the domain of . It's up to you to find what that domain is.

Like I said, draw the function, and choose a domain in which there are not any repeating values. - August 2nd 2010, 04:39 PMMacstersUndead
Try looking at this interval. :)

edit:// mind blanked. - August 2nd 2010, 04:42 PMProve It