Very Basic Trig

Adding and Subtracting Vectors
- Addition: Head to Tail
- Subtraction: Add negative of one vector
Length of Side
Opposite of angle

O = Hsinθ
Length of Side
Adjacent to angle

A = Hcosθ
Special Triangles
Lengths of a 30, 60, 90 trigangle
Special Triangles
Lengths of a 45, 45, 90 triangle
Special Triangles
Derived from Pythagorean Theorem

sp
Sine Values
sin0^o

0
Sine Values
sin30^o

0.5
Sine Values
sin45^o

1/(2)^1/2 = 0.7
Sine Values
sin60^o

(3)^1/2/2 = 0.85
Sine Values
sin90^o

1
Cos Values
cos0^o

1
Cos Values
cos30^o

(3)^1/2/2 = 0.85
Cos Values
cos45^o

1/(2)^1/2 = 0.7
Cos Values
cos60^o

0.5
Cos Values
cos90^o

0