Question

how to calculate this??

using the diff. length dl , find the length of each following curve.

p=3,π÷4<θ<π÷2,z=constant

Answer 1

what are the curve equations?

Answer 2

i would guess p is some kind of parameter, and z is the third dimention component, so the curve is plane. And since u put angle π÷4<θ<π÷2 i ques the equations are in polar form. The formula for curve length in polar form is
s =\[\sqrt{r ^{2} + r´_{θ}^{2}}\] where r is the radius and θ polar angle. I hope it helps