Question

y=sinX how do you get the value of x

Answer 1

x=arcsin(y)

Answer 2

Example: if sin 30 degrees = 1/2 (which is true), then
\[\arcsin \sin 30 =\arcsin \frac{ 1 }{ 2 }=30 \deg~or~\pi/6 rad\]

Answer 3

Please read up on "inverse trig functions." Come back here (to OpenStudy) with any questions that may arise.