# Blog #17

Throughout this unit we not only reviewed trig but also learned new lessons. SOH CAH TOA can be rewritten as sin y/r, cos x/r and tan y/x.

we learned reference angles, which I find are easiest to solve when using a visual, such as a graph. The reference angle is determined by the closet x-axis, this will help decide whether or not you add or subtract from the degree of each quadrant.

we also learned the 2 special triangles. one we got by cutting a square in half and the other by cutting an equilateral triangle in half, these are used when we are asked for an exact ratio.

lastly we learned 2 new formulas, sin law and cosine law, these are used to solve non-right angle triangles, one or the other can only be used by fitting certain requirements

I tried to post the picture but my edublog isn’t working, so I will email your the picture.

# Blog #15

This week we were taught how to multiply ugly fractions, we were taught how to do this during grade 9 and 10, but this week we brought in a lot of new concepts. We were taught to eliminate some terms that were the same on top as they were on the bottom and we also learnt about many other tips. Jaxson 🙂

# Blog #13- Recipricals

This week we were taught about reciprocals.

In this blog I will be teaching you how to draw reciprocals for a linear graph.

Second step: figure out the x intercept

Third step: find the -1 and 1 on the y axis

Fourth step: graph the reciprocal

Fifth step: find the points # Blog #12- graphing absolute values.

This week in Pre-Calc 11, we learned how to graph absolute values. These can be applied to both linear and quadratic functions. This task is very easy to complete.

When graphing absolute values the quatratic or linear line will never go below the x intercept.

When the parabola has a absolute value it forms a W shape.

This all happens because absolute value can never be a negative. # Pre Calc 11 – Blog #11

This week we learnt about systems of equations. A system of equations is a collection of two or more equations with a same set of unknowns. In solving a system of equations, we try to find values for each of the unknowns that will satisfy every equation in the system. The equations in the system can be linear or non-linear.

First step: Factor out the equation

Second step: Find the zeros

Last step: Test the numbers to see if your equation is true # Blog 5 – Trinomials

This week in pre-calc we learned how to factor using trinomials.

There are a couple steps to figuring this out, but once you have figured it out it is very simple.

1. identify a,b, and c in the trinomial ax2+bx+c.
2. write down all factor pairs of c.
3. identify which factor pair from the previous step sums up to b.
4. Substitute factor pairs into two binomials.

example:

# Blog 6 – quadratic equation

This week in Ms burtons pre calc class we learnt how do solve using the quadratic equation. To solve this it’s easiest to determine was terms are A,B, and C. Once these variables are determined substitute these variables for the numbers from the equation. Use bedmas to solve for X