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OpenStudy (anonymous):
Why can't cos^-1(0) equal -pi/2???
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OpenStudy (jdoe0001):
hmmm what makes you think it doesn't?
OpenStudy (anonymous):
because it just isn't....and I don't know why??
OpenStudy (anonymous):
I think they only ever mention the positive value.
OpenStudy (tkhunny):
It's just a convention - sufficiently powerful that calculators are programmed that way. The problem to be solved was making the inverse a FUNCTION. A reasonable choice had to be made.
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