Function Name 
Abbreviation for Function Name 
Function Value for $\alpha$ 
sine 
sin 
$\sin(\alpha) = \frac ac$ 
cosine 
cos 
$\cos(\alpha) = \frac bc$ 
tangent 
tan 
$\tan(\alpha) = \frac ab$ 
cotangent 
cot 
$\cot(\alpha) = \frac ba$ 
secant 
sec 
$\sec(\alpha) = \frac cb$ 
cosecant 
csc 
$\csc(\alpha) = \frac ca$ 
Triangle Trigonometric Functions 
