 Cot, sec and csc

 
These trigonometric functions are the reciprocals of the sine, cosine and tangent.
 
The inverse trigonometric functions are frequently used in many fields. However, they are usually not referred to explicitly, but rather as "1/" sin, cos or tan. As elsewhere on CalcTool, the angle may be input in any of a range of units, as chosen by use of the menu.  