Google - sin^-1(sin(5*3.14)-3)?

Start inside. You are looking for the sine of 5π. But 4π is twice around the circle and back to 0, so you are looking for the sine of π, which is 0.

So you subtract 3 from 0 and now you are looking for the angle whose sine is -3 and that is not valid.

Now suppose you explain why some people preface their questions with "Google - "?