Originally Posted by

**Bosse** Hi,

Im working as a mechanical designer. In the current project I need to calculate the angle of one arm as a function of another arms angle. The two arms are connected with a third arm. All the geometry is known but I cant solve the equation describing the angles.

The problem boils down to the following:

1) A*sin(X)+B*cos(Y)=C

2) A*cos(X)-B*sin(Y)=D

A & B are known constants.

C & D are known variables (functions of the driving angle in my mechanical design).

I need to know how X & Y varies according to C and/or D

Best regards

Bosse

Sweden