Looking for free Engineering Math help?
We have a series of free Engineering Mathematics Videos.
The topics are Chain rule, Partial Derivative, Taylor Polynomials,
Critical points of functions, Lagrange multipliers, Vector
Calculus, Line Integral, Double Integrals, Laplace Transform,
Fourier series.
We also have free math calculators and tools to help you
understand the steps and check your answers.
Chain
rule: partial derivative
Chain rule: identity involving partial derivatives Chain rule & partial derivatives Partial derivatives and PDEs tutorial Partial derivatives and error estimation 
Taylor
polynomials: functions of two variables
Leibniz' rule: Integration via differentiation Evaluating challenging integrals via differentiation: Leibniz rule 
How
to find critical points of functions
Critical points + 2nd derivative test: Multivariable
calculus How to find and classify critical points of functions 
Lagrange
multipliers Extreme values of a function subject to a
constraint Lagrange multiplier example: Minimizing a function subject to a constraint Multivariable Calculus: Directional derivative of $f(x,y)$ Lagrange multipliers example 
Vector
Calculus Divergence of a vector field Curl of a vector field (ex. no.1 & 2) 
Path
integral (scalar line integral) from vector calculus
Line integral example in 3Dspace Line integral from vector calculus over a closed curve Line integral from vector calculus over a closed curve Line integral example from Vector Calculus 
Double
integral tutorial
Double integrals in polar coordinates Double integrals and area 
Double integrals Volume between two surfaces Volume of a tetrahedron Reversing the order of integration Reversing order in double integrals 
Homogeneous
first order ordinary differential equation
Solution to a 2nd order, linear homogeneous ODE with
repeated roots 2nd order ODE with constant coefficients: simple method of solution 2nd order ODE with constant coefficients: nonstandard method of solution 
Intro
to Laplace transform
Laplace transform + differential equations First shifting theorem of Laplace transforms Laplace Transform: First Shifting Theorem 
Second
shifting theorem of Laplace transforms
Laplace Transform: Second Shifting Theorem Laplace Transform of tf(t) 
Intro to
Fourier series and how to calculate them
How to compute a Fourier series: an example Fourier series + differential equations 
