4.9
We started by looking at problems from the most recent test. Getting the x and y intercepts just involves setting one variable or the other equal to zero since that is where the equation will …
Main Content
Why to use the Law of Sines and the Law of Cosines
We looked at problems involving the Law of Sines and the Law of Cosines. You can use these equations with any triangle, they do not have to be right triangles. Depending on the information you have, …
Continue Reading about Why to use the Law of Sines and the Law of Cosines →
Why you should move beyond ‘undefined’ and think more in terms of infinity and negative infinity for some problems
Some other problems involved looked at shapes of graphs. Division by zero should not longer be thought of as simply 'undefined'. In some of these problems it indicated a vertical asymptote which can …
How to find a second complex root when factoring a polynomial using synthetic division
A few of the problems involved synthetic division. They might start as third degree or fourth degree polynomials with one or more of the roots given. There was an equation that would give a second …
How small mistakes propagate and multiply in Calculus problems
We looked some at the previous test. But focused on material for the upcoming test. One thing was the product rule, he had made a mistake before with it on another test. Often there were small …
Continue Reading about How small mistakes propagate and multiply in Calculus problems →
How parentheses help you keep track of terms and avoid making mistakes
We spent most of the time on a Friday sheet. Including parentheses when the problems get more complicated can be very helpful. In the case of these problems, it was useful to see that multiply parts …
Continue Reading about How parentheses help you keep track of terms and avoid making mistakes →