# Solving 3x1 matrix, two variables

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Yarne Schlösser el 29 de Abr. de 2021
I am trying to solve a 3x1 matrix which looks like follows:
C = [(2*cos(theta2)*sin(theta3))/25; (2*cos(theta2)*cos(theta3))/25 ; (2*sin(theta2))/25 + 81/1000];
The goal is get a answer for theta2 and theta3 for which C is equal to C = [0.0862;0.2370;0.1136];
I tried to it like this:
syms = theta2 theta3
AC = 0.08
OA = 0.081
C = [AC*cos(theta2)*sin(theta3); AC*cos(theta2)*cos(theta3); OA + AC*sin(theta2)];
solutions1 = solve(C == [0.0862;0.2370;0.1136])
however, doing this it get the following:
solutions1 =
struct with fields:
theta2: [0×1 sym], in which val =
Empty sym: 0-by-1
theta3: [0×1 sym], in which val =
Empty sym: 0-by-1
Kind regards.
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