The inverse of Cos x is a function. The domain of Cos x could be ??? How would I find the domain???
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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?
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.
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.
Try looking at this interval.
edit:// mind blanked.
Originally Posted by MacstersUndead Try looking at this interval.
edit:// mind blanked. Well thanks for telling the OP the answer :|
Now, can you see WHY they would restrict the domain to be ?
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