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cantRemember

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Ok, so for a give function f(x) it's curve length from a to b is supposed to be

∫(1+(f '(x))^2)dx evaluated from a to b. However even wolfram alpha had a hard time solving that, plus the results were wrong.

What am I missing?

PS: With f(x)= sqrt(r^2-x^2)

∫(1+(f '(x))^2)dx evaluated from a to b. However even wolfram alpha had a hard time solving that, plus the results were wrong.

What am I missing?

PS: With f(x)= sqrt(r^2-x^2)

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