>>13338776You just use trigonometry.
M-1'-2' is a right triangle where the right angle is at vertex 1'. The sides of that triangle are of length , , and (1'-2', 1'-M and 2'-M respectively)
Now you can use the definition any trigonometric function defined over the triangle to find that angle:
Using tan(alpha) yields your result.
Alternatively, you can omit the fact it's a right triangle entirely and just use cosine theorem:
This yields the same result as picking cos(alpha) in the method before.
You can of course use the sine theorem too, but you would have to recognize the right angle and the fact its sin() is 1 since you don't know the other angle either.
And this of course yields the same result as if you had picked sin() using the first method.
>that quadratic contour>that solenoid in the back>implying I don't recognize this book.Shoulda listened to mr. ?pa?a? O??a? in the morning.
