This week in math we learned about the Sine Law. The Sine Law includes an equation which you can use to solve triangles, as long as you have three clues: either 2 side lengths and an angle or two angles and a side length. You also need a matching pair of a side length and […]

# Category: Math 11

# Week 16 in Precalc 11

This week in math we learned about angles in standard form. First, we need to know some terminology. The rotation angle is the angle formed between the initial arm and the terminal arm. We would draw a sketch of this on a graph, that has the x-axis and the y-axis. This initial arm is the […]

# Weel 15 in Precalc 11

This week in math we learned how to solve rational equations. A rational equation is like a rational expression, but in an equation (so there’s an equal sign) with most-likely multiple rational expressions. Because it’s an equation and has an equal sign, you can solve it and find solution(s). The first step is to factor […]

# Week 14 in Precalc 11

This week in math we learned how to multiply and divide rational expressions. A rational expression is a quotient of two polynomials, so it’ll look like a fraction but with variables. When it comes to multiplying, there are a few simple steps you need to follow. First, find the non-permissible values. Non-permissible values are variables […]

# Week 13 in Precalc 11

This week in math we learned how to graph linear reciprocal functions. The parent function would be in the format: f(x)=mx+b, but the reciprocal of that would look like f=. To graph this, the first step would be to graph the original parent function. So, as we learned before, use the slope and y-intercept to […]

# Week 12 in Precalc 11

This week in math we learned how to solve systems algebraically when one is a linear system and the other quadratic using substitution. We learned about this method in Math 10. As a refresher, substitution is when you substitute one equation into the other and put the found variables into the original equation to find […]

# Week 11 in Precalc 11

This week in math we learned how to graph quadratic inequalities in two variables. Some basic information to know first is what the signs mean, e.g. < or > means there it will be a broken line when graphed (or dotted line). ≤ or ≥ means it will be a solid line when graphed. The first step […]

# Week 10 in Precalc 11

This week in math we learned how to solve quadratic inequalities using a sign chart. To recall, in previous years we had learned how to solve linear inequalities and how to show those on a number line. For example: 2x-3>11 2x>14 x>7 (all numbers greater than 7) On a number line, we’d show that all […]

# Week 9 in Precalc 11

This week in math we learned how to convert quadratic functions into general form, factored form, and standard form from other forms. General form is y=a+bx+c, where c is the y-intercept. Factored form is y=(x-x1)(x-x2), where x1 and x2 are the x-intercepts. Standard form is y=a+q, where a is the stretch or compression of the […]

# Week 8 in Precalc 11

This week in math we learned how to determine the properties of a quadratic function. On a graph, a quadratic function looks like a U or upside down U, it’s possible it could be a V as well. This is called a parabola shape, which means it’s symmetrical. The information we want to find out […]