Hello lsnyder and is therefore is a one-to-one function, with values in the range . So we can find its inverse, using , taking the angle in the range to .

So, let

Then

So the inverse function (replacing by ) is

I assume that you have a calculator that will give you inverse tangents and inverse sines. Then:2) Evaluate each of the inverse trig functions in radians rounded to 4 decimal places

to 4 d.p.

And

to 4 d.p.

Grandad