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OpenStudy (anonymous):
Range of xcosx. Is there a mathematical way to find the range for this?
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OpenStudy (anonymous):
not that while \(\cos(x)\) is stuck between -1 and 1, when you multiply by \(x\) you get any number you like
OpenStudy (anonymous):
*note
OpenStudy (anonymous):
That makes sense. But can you, I mean prove this more mathematically?
OpenStudy (anonymous):
i count thinking as being mathematical
OpenStudy (anonymous):
HAha.Fine. You Win :)
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OpenStudy (anonymous):
maybe a picture is convincing http://www.wolframalpha.com/input/?i=x*cos%28x%29
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