How do you calculate sin1(9.412)?

1 Answer
Feb 12, 2016

51.57 degrees as also 128.43 degrees.

Explanation:

Sine of an angle can take value between 1 and +1.

As 9.412=0.78333, the angle whose sine is 0.78333 is sin1(9.412).

Using a scientific calculator this comes out to 51.57 degrees. It can also be 18051.57 i.e. 128.43 too as sin(πθ)=sinθ.

One can add multiples of 360 degrees too as it does not affect sine of an angle.