How do you use a calculator to evaluate #sin^-1 (-0.4)# in both radians and degree?

1 Answer
Nov 29, 2016

The order in which the keys are to be pressed is as follows.

Assuming that the calculator is in the degree mode, press


Answer in degrees is displayed at the top as

To convert to radian units, continue as follows
Answer in radian units is displayed in the top as

Note that [SHIFT] [EXP] gets the value of #pi#.

In some calculators, this is directly available through [SHIFT] [#pi#].