Question

cotangent (-690)? I don't have a cotangent button on my calculator. could I just use the tangent button?

Answer 1

to compute the cotangent on your caculator. first use the tangent button, then the 1/x button or 1 over the result of the tangent button.

Answer 2

so it would be sqrt 3 ?

Answer 3

\[ \large -\sqrt{3}\]

Answer 4

it would be the same for cot(-150) = sqrt 3 ? correct?

Answer 5

yes