268 Videos for "x"

Angle Inclination of a Line  Concept
Math › Trigonometry › Advanced Trigonometry
How to find the angle of inclination of a line. 
Area of Triangles  Problem 2
Math › Geometry › Area
How to find an unknown variable, x, when the area is given and the base and height of a triangle is given in terms of x. 
Limits of Rational Functions  Concept
Math › Precalculus › Polynomial and Rational Functions
How to evaluate the limit of k/x^n as x goes to infinity (or negative infinity). 
Continuity  Problem 2
Math › Calculus › Limits and Continuity
How to show that a function is discontinuous at a point x=a because the limit as x approaches a does not exist. 
Concavity and Inflection Points  Problem 1
Math › Calculus › Applications of the Derivative
How to show that a function is discontinuous at a point x=a because the limit as x approaches a does not exist. 
Concavity and Inflection Points  Problem 2
Math › Calculus › Applications of the Derivative
How to show that a function is discontinuous at a point x=a because its limit and its value at x=a are different. 
Continuity  Problem 3
Math › Calculus › Limits and Continuity
How to show that a function is discontinuous at a point x=a because its limit and its value at x=a are different. 
Reflections  Problem 1
Math › Geometry › Transformations
How to reflect a figure over the yaxis. 
Finding an Inverse Graphically  Concept
Math › Algebra 2 › Inverse, Exponential and Logarithmic Functions
How to graph the inverse of a function using points. 
Using the Inverse Trigonometric Functions  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to prove an identity that involves sin1 x and cos1 x. 
Introduction to Rational Functions  Problem 1
Math › Precalculus › Polynomial and Rational Functions
How to express any rational function f(x) = (ax + b)/(cx + d) as a transformation of y = 1/x. 
Using the Inverse Trigonometric Functions  Problem 1
Math › Precalculus › Advanced Trigonometry
How to prove an identity that involves sin1 x and cos1 x. 
Derivatives of Logarithmic Functions  Problem 2
Math › Calculus › The Derivative
How to find an equation of the line tangent to the graph of f(x)=ln(x) at a point, and how to use the tangent to approximate values of natural log. 
Finding an Inverse Graphically  Problem 1
Math › Algebra 2 › Inverse, Exponential and Logarithmic Functions
How to graph an inverse of a function using a piece of paper. 
Solving a Logarithmic Equation  Problem 5
Math › Precalculus › Exponential and Logarithmic Functions
Using the property that if log x = log y, then x = y , including checking for extraneous solutions. 
Finding an Inverse Graphically  Problem 2
Math › Algebra 2 › Inverse, Exponential and Logarithmic Functions
How to graph an inverse of a collection of line segments. 
Derivatives of Exponential Functions  Problem 2
Math › Calculus › The Derivative
How to use the derivative of an exponential function to find an equation of the tangent line to the graph of f(x) = e^x. 
Trigonometric Equations that Require Factoring  Problem 3
Math › Precalculus › Advanced Trigonometry
How to solve a sine and cosine equation by factoring: ?2 sin2 x ? 5 cos x + 4 = 0. 
Solving a Logarithmic Equation  Problem 5
Math › Algebra 2 › Inverse, Exponential and Logarithmic Functions
Using the property that if log x = log y, then x = y , including checking for extraneous solutions. 
Trigonometric Equations that Require Factoring  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to solve a tangent equation by factoring: tan2 x  tan x ? 2 = 0.