**tangent tan **

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

**See also**

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