- Multivariable calculusSecants and TangentsPartial DerivativesContoursRGB Color SystemProperties of the GradientDirectional DerivativesGradient - maximum/minimumGradient - contoursRiemann SumDefinition of the double integralType I RegionType II RegionPolar GrapherTriple Integral in rectangular coordinatesTriple Integral Cylindrical CoordinatesTriple Integral Spherical CoordinatesJacobian Animation