sin(1.624)e^(-(pi+alpha-1.624)/18.85) - sin alpha = 0, value of alpha please
There are an infinite number of solutions. Which one(s) are you interested in?
Here are just a few of them for you!
α ≈ 1.05739903452703... α ≈ 2.17883595173276... α ≈ 6.97307249503624... α ≈ 8.80926556614570... α ≈ 13.0456763332795... α ≈ 15.2860747705649... α ≈ 19.1889359218181... α ≈ 21.6954025628196...