Trig identities are pretty tough for most people, because 1) there are so many of them, and 2) they’re hard to remember, and 3) it’s tough to recognize when you’re supposed to use them!

Read MoreTrig identities are pretty tough for most people, because 1) there are so many of them, and 2) they’re hard to remember, and 3) it’s tough to recognize when you’re supposed to use them!

Read MoreScientific notation is all about proper form. There’s only format that qualifies as proper scientific notation, and that’s the product of a decimal term and a power of 10. Moreover, the number to the left of the decimal point must be between 1 and 9.

Read MoreEuler’s method is a numerical method that you can use to approximate the solution to an initial value problem with a differential equation that can’t be solved using a more traditional method, like the methods we use to solve separable, exact, or linear differential equations.

Read MoreThe most important thing to remember about graphing lines is that you always need some combination of the slope of the line, and/or points on the line in order to graph it.

Read MorePartial derivatives are just like regular derivatives, but for multivariable functions.

Read MorePythagorean theorem is a tool you’ll use all the time when you’re dealing with triangles, and you will always be dealing with triangles, no matter what math class you’re taking.

Read MoreTrigonometric substitution (more affectionately known as trig substitution, or trig sub), is another integration method you can use to simplify integrals.

Read MoreExponents are a fundamental math tool that you learn in Pre-algebra, but a lot of people continue to struggle with them all the way through calculus!

Read MoreGraphing polar curves and, more specifically, graphing circles, is a hard thing to master at first. But, with practice, it gets a lot easier, and you'll get much, much faster.

Read MoreHere are two quick ways to multiply 9 by any number 1 through 10.

Read MoreThe “1,089 rule” isn’t really a rule at all, it’s more like a fun thing that happens with numbers that you can explain with algebra.

Read MoreWhen you’re doing an area between curves problem, one of the toughest parts of the problem is figuring out the orientation of the curves.

Read MoreIf you want to add up all the numbers 1 through anything, like 1 through 100, or 1 through 23, there’s actually an easy way to do it.

Read MoreThis is a quick trick for finding the square of two-digit numbers.

Read MoreMost people thing long division is boring and tedious, but when you understand the math that's going on behind the scenes, it's actually pretty cool!

Read MoreVertical asymptotes are important boundary lines for a function, because, if you can find them, they're a line that the graph cannot cross, which can really help you sketch a more accurate picture of the curve.

Read MoreCritical points are one of the best things we can do with derivatives, because critical points are the foundation of the optimization process.

Read MoreLinear approximation, or linearization, is a method we can use to approximate the value of a function at a particular point.

Read MoreWe already know that the slope of a function at a particular point is given by the derivative of that function, evaluated at that point.

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