Inverse Trig vs Reciprocal Trig Functions
Many students think that sin⁻¹(x) means 1/sin(x) but these expressions represent two completely different ideas. In this video, you’ll learn the difference between inverse trigonometric functions and reciprocal trigonometric functions. We’ll compare inverse sine, inverse cosine, and inverse tangent to cosecant, secant, and cotangent so you can avoid one of the most common mistakes in […]
Simplifying Complex Fractions Step-by-Step
Complex fractions can look intimidating, but they’re really just a combination of algebra skills you’ve already learned. In this video, you’ll learn how to simplify complex fractions involving rational expressions by combining expressions, multiplying by the reciprocal, factoring, and canceling common factors. We’ll work through an example step-by-step and show how multiple algebra concepts come […]
Transformations of Functions | a, h, and k Explained
Have you ever looked at the equationcand wondered what the values of a, h, and k actually do? In this video, we’ll start with the parent function and explore how each parameter changes the graph. You’ll learn how to recognize vertical stretches and compressions, horizontal shifts, and vertical shifts without memorizing complicated rules. In this […]
Who Created the Quadratic Formula?
Did someone actually create the quadratic formula, or does it come from somewhere else? In this lesson, we’ll start with the standard form of a quadratic equation and use the process of completing the square to derive the quadratic formula step by step. You’ll see that the quadratic formula isn’t magic and wasn’t simply invented […]
Determining the Angle of Elevation vs Angle of Depression
Understanding the difference between angles of elevation and angles of depression is an important application of right triangle trigonometry. In this lesson, you’ll learn how to identify each angle, draw accurate diagrams, and use them in trigonometric ratios to solve real-world problems involving heights, distances, and angles. Topics covered: • Angle of elevation • Angle […]
How Do We Determine End Behavior
Understanding end behavior is one of the most important skills when graphing polynomial functions. In this video, you’ll learn how to determine what happens to a polynomial as x approaches positive infinity and negative infinity. We’ll focus on how the degree of the polynomial and the sign of the leading coefficient work together to determine […]
Why is there a ± for quadratics?
Why do we write ± when solving quadratic equations, but not when evaluating square roots? In this lesson, we’ll explore one of the most common misconceptions in algebra and uncover the reasoning behind it. You’ll learn how functions, inverses, and solving equations are connected, and why: ✔️ √25 = 5 ✔️ x² = 25 has […]
Simplifying Square Roots Using Perfect Squares
Simplifying radicals doesn’t have to be complicated. The key is learning how to identify perfect square factors hidden inside the radical and use them to rewrite the expression in simplest form. In this video, you’ll learn a step-by-step method for simplifying square roots by breaking numbers into factors, finding the largest perfect square, and pulling […]
Graphing Systems of Inequalities | Shade the Overlap
Graphing a system of inequalities is about more than drawing lines—it’s about finding the region where all of the inequalities are true at the same time. In this video, you’ll learn how to graph systems of inequalities step-by-step by identifying boundary lines, determining when to use solid or dashed lines, shading the correct regions, and […]
Matrix Multiplication Made Easy | Row by Column
Matrix multiplication can seem confusing at first, but once you understand the row-by-column process, everything starts to make sense. In this video, you’ll learn how to multiply matrices step-by-step by matching rows from the first matrix with columns from the second matrix. We’ll work through examples together and break down exactly where each entry in […]