**cotangent cot ctg**

The trig function cotangent, written cot θ. cot θ equals or . For acute angles, cot θ can be found by the SOHCAHTOA definition, shown below on the left. The circle definition, a generalization of SOHCAHTOA, is shown below on the right. *f*(*x*) = cot *x* is a periodic function with period π.

**See also**

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