How do you calculate #cot^-1 0.684#?
If you are working with a calculator you will only have the Sin, Cos and Tan ratios. However, these can be used to calculate the other three ratios Cot, Sec and Cosec.
The question here is asking " What angle has a Cot value of 0.684?" This is read as ArcCot 0.684
First change the cot value that is given to a Tan value by finding its reciprocal
Now you have changed the question to
On a calculator:
The angle is 55.6°