# Derive the Volume of a Sphere Using Integrating the Surface Area

This video explains how to derive the volume formula for a sphere using integration.

# Derive the Volume of a Sphere Using Integration (Disk Method)

This video explains how to derive the volume formula for a sphere using integration.

# Derive the Area of a Circle by Integrating the Circumference

This video explains how to derive the area formula for a circle using integration.

# Derive the Area of a Circle Using Integration (x^2+y^2=r^2)

This video explains how to derive the area formula for a circle using integration.

# Derive or Prove the Equation of a Tangent Plane to a Surface

This video derives or proved the equation used to determine a tangent plane to a surface.

# Derive the Variation of Parameters Formula to Solve Linear Second Order Nonhomogeneous DEs

This video derives or proves the variation of parameters formula used to find a particular solution and solve linear second order nonhomogeneous differential equations.

# Derive the Value of an Annuity Formula (Compounded Interest)

This video explains how to derive the value of an annuity formula using the case when deposits are made annually with interest compounded annually.