Question

arcsin (1/square root of 2)

Answer 1

45 degrees and 135 degrees

Answer 2

This means the angle whose sine is 1/sqrt 2.

The domain of arcsin is 1,-1 so pi/4 and 3pi/4 (45 and 135 degrees).

Answer 3

\[\sin^{-1} \left( 1\div \sqrt{2} \right)\] You mean that? Why doesn't anybody use LaTeX??

Answer 4

\[Sin^{-1} \frac{1}{\sqrt{2}}\]

Sorry, that better?