2. Use the SOHCAHTOA ratios and a trig friendly calculator to find the following 'Missing Angles'. I have the key so you can check your work and make sure you are on the right track.
NOTE: The calculator buttons asin, acos, and atan are the same thing as taking the inverse of sin, cos or tangent.
1. Watch the following Khan Academy video again as a refresher for how to find a missing angle.
3. Feel like you got it? If not look at this lesson before you continue on the next set of problems.
1. Intro to Trigonometry Terms
The first video is an introduction to the terms we will be using in the unit and how they connect to the triangle!
2. How to Use SOHCAHTOA
Find the measurement of angle by determining ratios of the side-lengths of the triangle. This is a great introduction video to calculating sine, cosine and tangent.
3. Expanding on Sine, Cosine and Tangent
Once you have a handle on using sine, cosine and tangent, take it one step further to use the angle itself to find a missing length of the triangle.
The following videos work through 3 examples of solving systems by elimination (simple addition to eliminate, subtracting to eliminate, and multiplying coefficients to get the right value).
Math Planet has a written lesson and videos to help tutor the skills and procedures needed to complete the elimination method. Check it out by clicking on the button below.
Practice all the skills you watched and read through by clicking on the button below.
Below is the 'Talking Bird' video we watched in class. It covers an example and Sal explains the steps necessary to solve by substitution.
Here is another video in which Sal walks through more simple examples of solving a system by substitution. Use your tool kit and watch as he walks through all the steps we took in class.
In this video, Sal works through examples of using the graphing method to find the solution to a system of linear equations.
In this video, Khan works through an example in which he solves for a specific variable. The variables are not the typical y and x, but the skill follows the same steps no matter the variables found in the equation.
This video provides several examples of direct and inverse variation and explores the tables of these examples to show how the variable are related.
Practice recognizing direct and inverse variation by following the link below:
The following website works through several examples of direct and inverse variation continuing on to look at examples of combined variation (direct and inverse).
This video from Khan Academy describes the Addition Rule with mutually exclusive events and non-mutually exclusive events.. Below is a link to a webpage that also walks through the Addition Rule in both scenarios, then ends with practice problems.
This video defines and works through a couple examples of mutually exclusive events.
When creating a probability distribution, it is important to know the entire sample space and how to calculate the probability of certain events within the sample space.