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OpenStudy (anonymous):
The range of f(x)=arcCos(x²/1+x²) is
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OpenStudy (welshfella):
Hint:- The range of x^2/(1 + x^2) is [0,1]
OpenStudy (welshfella):
Now you need to find the range of angles whose cosine corresponds to the above.
OpenStudy (anonymous):
nice
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