Precalc Ch 7. Important Formulas

Precalculus Ch 7. Unit Circle & Other Important Formulas

Arc Length Formula

s = rθ (in radians)

Figuring out points on a circle (x,y)

( r cos θ, r sin θ )

cos, sin & 1

cos² t + sin² t = 1

sec and tan conversion

1 + tan² t = sec² t

cot and csc conversion

1 + cot² t = csc² t