Pre-Calc Unit 6

Area of a Sector (θ in degrees)

A = θ/360°xπr²

Area of a Sector (θ in radians)

A = ½xθr²

Arc Length (θ in degrees)

s = θ/360°x 2πr

Arc Length (θ in radians)

s= θr

tanθ

sinθ/cosθ

cotθ

cosθ/sinθ

sin² θ + cos² θ

1

tan² θ + 1

sec² θ

cot² θ + 1

csc² θ

sinθ

1/cscθ

cscθ

1/sinθ

cosθ

1/secθ

secθ

1/cosθ

tanθ

1/cotθ

cotθ

1/tanθ

sine (unit circle)

y/r

cosine (unit circle)

x/r

tangent (unit circle)

y/x