Mathematics

Trigonometry

Trig Functions

  • How to Tell Sines from Cosines
  • Solving Trig Equations
  • Solving Trig Equations with Calculators, Part I
  • Solving Trig Equations with Calculators, Part II
  • Trig Functions
  • Trigonometric Functions History
  • Trig Minibook
  • Top of Page

    • Laws

  • Arccosine Function
  • Arcsine Function
  • Arctangent Function
  • Cosine Function
  • Law of Cosines
  • Law of Sines
  • Sine Function
  • Tangent Function
  • Trigonometry Formulas
  • Top of Page

    • Coordinates

  • Converting from Polar to Rectangular Coordinates
  • Polar Coordinates
  • Top of Page

    • Derivations

  • Deriving sin(a+b), cos(a+b)
  • Deriving Sines & Cosines
  • Derivation of Double-Angle Identities, YouTube
  • Proof of the Sum Formulas
  • Proofs of Trigonometric Identities
  • Top of Page

    • Resources

  • Common Trig Errors
  • Top of Page