Posted by kenny on .
I have the trigonometric equations:
y=3+2sec(pi/8)(x3)
y=12+4cot(pi/6)(x1)
y=3+7csc(pi/4)(x1)
how do I make these into sine, cosine, and tangent equations so that I can work with them more easily?

trigonometry 
drwls,
Is the last parentheses part of the angle?
for example, do you mean
y=3+2sec[(pi/8)(x3)] ?
If not, just substitute 1.0824 for sec pi/8 etc.