AP Calc - PreCalc Review

Unit Circle

Unit Circle

sin(pi/6)

1/2

sin(pi/3)

√3/2

sin(3pi/2)

−1

cos(pi/4)

√2/2

cos(pi/6)

√3/2

cos(2pi)

1

tan(pi/6)

√3/3 or 1/√3

Special Right Triangle 30 - 60 - 90

Special Right Triangle 45-45-90

Trigonometric Identities

Cos²θ + Sin²θ = 1
1 + tan²θ = sec²θ
1 + cot²θ = csc²θ

Double Angle Identity
cos(2θ) =

cos²θ-sin²θ
1 - 2sin²θ
2cos²θ - 1

Double Angle Identity
sin(2θ) =

2sinθcosθ

Log Properties

Area of a Trapezoid

1/2h(b1+b2)

Area of a Circle

πr²

Area of a Trianlge

1/2bh

Area of a Rectangle

lw or bh

Horizontal Asymptote Rules

Point Slope Form

y-y1=m(x-x1)

Slope Formula

(y₂- y₁) / (x₂- x₁)