Find the equation of a plane containing two lines

Parametric equations for the line of intersection of two planes

Determining the Equation of a Tangent Plane

Show a Given Vector-Valued Function Lies on a Cone

Contours and Tangents to Contours

Taylor Polynomials of a Function of Two Variables

Double Integrals over General Regions

Sketch the solid of integration

Finding a Potential for a Conservative Vector Field

Transform line integral to normal single integral

Line Integrals of Vector Fields

Polar example: volume under paraboloid