trig. formula Question



HI I have looked everywhere I can and I cannot find the formula for the
trigonomic functions
Cosine
Sine
Tangent
Inverted Cosine
Inverted Sine
Inverted Tangent
I can do these on a calculator any day but I couldn't do them with out
one.
I figured you guys would know seeing as seems you all are a bunch of
math guros.
Thanks

.