MSJA Math.asin(3/5)*(180/3.1415)
Math.atan(3/4)*(180/3.1415)
Math.acos(4/5)*(180/3.1416) 



the three internal angles in 
degrees are 36.87, 53.13, and 90.
 The three angles in
 radians are 0.64, 0.93, and 1.57.

The three angles of a 3:4:5 triangle are:
90 degrees (the right angle),
acos(4/5) = asin(3/5) = 36.87 degrees
acos(3/5) = asin(4/5) = 53.13 degrees

SOHCAHTOA:

SOH: SinX =opposite/hypotenuse

CAH:CosX =Adjacent/Hypotenuse

TOA:TanX =Opposite/Adjacent