According to the text the answer should come up to 2.3154725 in radian mode.
The text states: "We take the inverse tangent of the reciprocal to find the inverse cotangent".
I therefore punch in:
like the examples show me but I get:
OK I just fugured it out:
In degree mode I punched in:
-47.33319621 + 180 (which is ∏ radians)
0.737037799 x ∏
but I can't fugure out how to get the answer strait into radians?