Pre Calculus

1. Triangles

1.1. Angles

1.1.1. Sine, Cosine, Tangent

1.1.1.1. Sine = Opposite/Hypotnuse

1.1.1.2. Cosine = Adjacent/Hypotnuse

1.1.1.3. Tangent = Opposite/Hypotnuse

1.1.2. Finding an side with angles

1.1.2.1. sin^-1 (x)

1.1.2.2. cos^-1(x)

1.1.2.3. tan^-1(x)

1.2. Special Triangles

1.2.1. 3,4,5 triangles

1.2.2. 60:30:30

1.2.2.1. 1, sqrt(3), 2

1.2.3. 90:45:45

1.2.3.1. 1,1, sqrt(2)