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