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Use the unit circle to find cot(-180)

User DaveyBoy
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4 votes

Answer:

undefined!!!

Explanation:

User Juliean
by
7.6k points
5 votes

if you don't have a Unit Circle, this is a good time to get one, you can find many online.

Check the picture below.

so, let's notice that, -180° has a positive counterpart angle of 180°, they both land on the same spot, thus cot(-180°) is the same as cot(180°).


\bf cot(-180^o)\implies cot(180^o)\implies \cfrac{cos(180^o)}{sin(180^o)}\implies \cfrac{-1}{0}\implies und efined

User Kunemata
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