Question

How do you evaluate `cot[cos^-1(sqrt5/6)]`?

Answer 1

0.402

Explanation:

Use calculator.
`sqrt5/6 = 0.373`
cos x = 0.373 --> arc `x = 68^@12`
sin x = sin 68.12 = 0.927
`cot x = (cos x)/(sin x) = 0.373/0.927 = 0.402`