Unit 4 -pre calc vectors

Angle of depression

Angle of elevation

When do we use law of sines

Angle - angle -side ( AAS), angle-side-angle ( Asa), side-side-angle ( SSA*ambiguous→ more than one triangle )

When do we use law of cosines

Side - angle-side (SAS) or side-side-side (SSS)

What is heron's formula to find side

What is heron's formula to find area

Component form

Equation for a component of a vector

Equation for finding magnitude/ length of a vector in component form

Unit vector

If magnitude/ length = one

Vector zero

When magnitude equals zero

Finding unit vectors

Standard unit vectors

(Addition formula) sum of u and V

Scalar multiplication of k times u equation

Dot product equation

Dot product property magnitude

Equation for angle between two nonzero vectors

Orthogonal vectors

Two vectors that create a right angle ( 90°) between them

Finding orthogonal vectors

Using dot product formula → dot product equals to zero

Perpendicular

When two lines intersect and create a right angle (90°)

How to solve w/ component form?

Work formula

Distance formula (2D)

Distance formula (3D)

3D vector components

Standard unit vectors in 3D

Parallel vectors