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• ### How to Graph Conic Sections in Parametric Form

Sometimes your pre-calculus teacher may ask you to graph conics in parametric form. Parametric form is a fancy way of sa...

In Calculus

• ### How to Solve Linear Systems Using Substitution or

When solving linear systems, you have two methods — substitution or elimination — at your disposal, and whic...

In Calculus

• ### How to Prove a Trigonometric Identity Containing a

When a square root appears inside a trigonometric identity, and you know both sides are equal, you have to square both s...

In Calculus

• ### How to Calculate the Tangent of an Angle

Because a lot of pre-calculus work involves trigonometric functions, you need to understand ratios. One important ratio...

In Calculus

• ### How to Solve Nonlinear Systems

In a nonlinear system, at least one equation has a graph that isn’t a straight line — that is, at least one...

In Calculus

• ### Solving Systems of Equations Using Determinants: C

If your pre-calculus teacher asks you to solve a system of equations, you can impress him or her by using Cramer’s...

In Calculus

• ### How to Find the Limit of a Function Graphically

When you’re given the graph of a function and your pre-calculus teacher asks you to find the limit, you read value...

In Calculus

• ### Working with Trigonometric Ratios on the Coordinat

To put angles on the coordinate plane, essentially all you do is look at the trig ratios in terms of x and y values rath...

In Calculus