Question #288858

Find the cylindrical coordinates of the points where the Cartesian coordinates are :


(3, 3,4)


1
Expert's answer
2022-01-24T08:25:16-0500

Solution

Relationship between Cartesian coordinates and Cylindrical coordinates is as follows:

r2=x2+y2r^2=x^2+y^2

tanθ=yxtan\theta=\frac yx

z=zz=z

Given

x=3

y=3

z=4

Hence

r2=32+32=18r^2=3^2+3^2=18

r=18=32r=\sqrt{18}=3\sqrt2

tan(θ)=33=1tan(\theta)=\frac{3}{3}=1

θ=π4\theta=\frac{π}{4}

z=4z=4

The cylindrical coordinates are given by

(32,π4,4)(3\sqrt2,\frac{π}{4},4) .


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