Asked by Anon
                Find the arc length of one arch of the sine curve.
I started it by doing y=sinx, y'=cosx
arc length= integral of sqrt(1+cos^2x)dx from pi/2 to 3pi/2
but I don't know how to integrate that! Thank you!
            
        I started it by doing y=sinx, y'=cosx
arc length= integral of sqrt(1+cos^2x)dx from pi/2 to 3pi/2
but I don't know how to integrate that! Thank you!
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