Trigonometry Functions

SOHCAHTOA

Remember this word for it will help you through any right triangle trigonometry.

SOH

Sin (angle degree) = Opposite side/Hypotenuse

CAH

Cos (angle degree) = Adjacent side/Hypotenuse

TOA

Tan (angle degree) = Opposite side/Adjacent side

Radical and Power Properties

Number of Solutions

Income/Profit Models

Quadratic Models

Estimating Power Model Lines

Traveling Models

Power Model Graphs

Permeter/Area/Volume

Unit 4 Review

The sections in Unit 4 are as follows:

Section 1:
Perimeter/Area/Volume

Section 2:
Power Model Graphs

Section 3:
Traveling calculations

Section 4:
Estimating power model line of best fit

Section 5:
Quadratic Models

Section 6:
Income/Profit Models

Section 7:
How many solutions on a Quadratic Model

Section 8:
Radicals

See the following posts for help on these topics

Quadratic Models

Quadratic Formula:

y = ax^2 + bx + c

(0,c) is the y -intercept for this formula (where the graph crosses the y-axis)

Vertex:
The vertex of the parabola is the maximum or minimum of the curve.

Roots/Zeros:
The roots or zeros of the graph is where the parabola crosses the x-axis.

Sample Quadratic Problem:

A diver on a 3 meter high spring board jumps at an upward velocity of 10 meters/second. Gravity is pulling the diver down into the water. Write a function for height, h, in terms of time, t.

Gravity is -4.9 m/s^2 or -16 m/s^2

h = -4.9t^2 + 10t + 3