When do I use sin^-1 and when do I just use sin?

Answer 1

Please see below

sin^-1 is used when you are trying to find the Angle that corresponds to a given Sine

sin( ) is used when you are trying to find the Sine of a given angle

sin(30°) = 1/2

sin^-1(1/2) = 30°

sin^-1(√3/2) = 60°

Degrees is usually the default mode on calculators but this should work for angles express in Radians too. Give it a try, if you have any questions send me a message.