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ZeHanz
What is the exact length of the graph of y = x², between (0, 0) and (2, 4). I know I have to integrate sqrt(1+4x²) from 0 to 2, but I have forgotten how to do this. I remember there was a trigonometric substitution...
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Thank you, but I'm not looking for the area under the graph! I want to know the *length* of it.
Refer to the attachment.
Thanks! I had already tried Wolframalpha myself, but couldn't get the "step by step" solution. The integral is indeed rather complicated...