cot(-240) = -0.5774, approx.
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The cotangent of 60 degrees is 1\(3^1\2).
-0.68
cot(45 deg) = 1.
cot(360°) = cot(0°) = tan(90°) = ∞
Cotangent is a trigonometric function. It is the reciprocal of the tangent.