~~NOTOC~~
<=[[4rpl:start| Index]] \\
<= [[4rpl:start#Math]]  

====== tan ======
tan (PI) ->tangent

===== Description =====
Calculates the tangent of the input angle.

===== Examples =====
<code 4rpl>
trace(tan(PI)) #prints 0
</code>
<=[[4rpl:start| Index]]