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Mathematics 15 Online
OpenStudy (anonymous):

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

OpenStudy (helder_edwin):

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.

OpenStudy (anonymous):

so it would be sqrt 3 ?

OpenStudy (helder_edwin):

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

OpenStudy (anonymous):

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

OpenStudy (helder_edwin):

yes

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