How do you evaluate $a r c cot (- 2)$ $arc cot(-2)$ on the Scientific Calculator?

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Answer 1 · 2016-07-15T14:10:39

Use $a r c cot (- 2) = a r c tan (- \frac{1}{2})$ $arc cot (-2)=arc tan(-1/2)$

If a = cot b, tan b = 1/cot b = 1/a#

Here $a r c cot (- 2)$ $arc cot (-2)$ is the angle whose cotangent is (-2) = angle

whose tangent is (-1/2) = arc tan (-1/2)#

How do you evaluate arccot(−2)arc cot(-2) on the Scientific Calculator?