Make: Robotic Arms

102 Make: Robotic Arms

STEP 3: CALCULATING



1

AND α

2

Now that we have our first set of subangle

variables, our next step will be to calculate our

next two subangle variables,



1

and α

2

. If we look

back to our original diagram, these two angles

are not a part of the right triangles we have been

working with. They are angles within the non–

right triangle portions of our diagram. Thankfully,

if we recall to the law of cosines, we know we can

easily find the value of one of the angles in a non–

right triangle as long as we know the length of

every side of our triangle. If we were to isolate just

the two non–right triangles, we see that we do in

fact ...