What main things should i know for the new york math b regents?

sin²x + cos²x = 1
radius times radians = arc length
quadratic formula (and discriminant to decide what the zeros are)
binomial expansion formula (for probability too)
sum of roots of a quadratic = -b/a; product of roots = c/a

"all students take calculus" (where trig functions are positive and negative)
exact values for sin/cos/tan 30º, 45º, 60º

there are some anyway