Does anyone know how the function names sin, cos, csc, sec, ... came about?(adsbygoogle = window.adsbygoogle || []).push({});

Wouldn't they be easier to remember if cos was 1/sin; csc was 1/sec; just like cot is 1/tan? (Instead of 1/sin = csc and 1/cos = sec.)

This is one thing in trig that always throws me off.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Trig function names: math history?

**Physics Forums | Science Articles, Homework Help, Discussion**