[input]asin( 300*sin(84) / 100 )[/input]
this is a complex solution.
[input]300*sin(84) / 100[/input]
the argument of asin(..) is 2.98356568610481.
[input]plot( sin(x), x=-360..360 )[/input]
sin(..) has a result between -1 and 1.
asin is the inverse of sin, so an argument outside of -1..1 (here 2.98356568610481) has to result in some "complex" result. (which is in this case really a complex number)
+3146 
