Skip to main content
Back

Precalculus Reference Sheet: Key Formulas and Identities

NotesPracticeVideo lessons

Study Guide - Learn with Videos

Curated lessons matched to your uploaded material – learn every topic step by step.

Factoring Polynomials

  • Guided course
    Factor by Grouping
    04:36
  • Guided course
    Introduction to Factoring Polynomials
    07:30
  • Guided course
    Factor Using Special Product Formulas
    6:29

Lines

  • Guided course
    Standard Form of Line Equations
    05:39
  • Guided course
    Types of Slope
    5:17
  • Guided course
    Point-Slope Form
    05:46

Linear Equations

  • Guided course
    Solving Linear Equations with Fractions
    04:02
  • Guided course
    Introduction to Solving Linear Equations
    07:48
  • Guided course
    Categorizing Linear Equations
    06:00

Common Functions

  • Guided course
    Graphs of Common Functions
    5:57

Introduction to Logarithms

  • Guided course
    Logarithms Introduction
    7:30
  • Guided course
    The Natural Log
    2:51
  • Guided course
    Evaluate Logarithms
    05:15

Properties of Logarithms

  • Guided course
    Product, Quotient, and Power Rules of Logs
    3:49
  • Guided course
    Expand & Condense Log Expressions
    4:22
  • Guided course
    Change of Base Property
    5:36

Arithmetic Sequences

  • Guided course
    Example 1
    02:35
  • Guided course
    Arithmetic Sequences - General Formula
    05:17
  • Guided course
    Example 2
    07:00

Geometric Sequences

  • Guided course
    Geometric Sequences - General Formula
    04:45
  • Guided course
    Geometric Sequences - Recursive Formula
    04:18

Trigonometric Functions on Right Triangles

  • Guided course
    Introduction to Inverse Trig Functions
    4:28
  • Guided course
    Fundamental Trigonometric Identities
    5:32
  • Guided course
    Introduction to Trigonometric Functions
    6:04

Special Right Triangles

  • Guided course
    45-45-90 Triangles
    04:39
  • Guided course
    Common Trig Functions For 30-60-90 Triangles
    6:24
  • Guided course
    30-60-90 Triangles
    5:35

Pythagorean Theorem & Basics of Triangles

  • Guided course
    Solving Right Triangles with the Pythagorean Theorem
    5:19
  • Guided course
    Review of Triangles
    4:42

Introduction to Trigonometric Identities

  • Guided course
    Simplifying Trig Expressions
    6:36
  • Guided course
    Example 1
    2:20
  • Guided course
    Example 4
    5:18

Sum and Difference Identities

  • Guided course
    Sum and Difference of Tangent
    4:47
  • Guided course
    Sum and Difference of Sine & Cosine Example 3
    2:42
  • Guided course
    Sum and Difference of Sine & Cosine
    06:14

Double Angle Identities

  • Guided course
    Double Angle Identities
    5:06
  • Guided course
    Double Angle Identities Example 1
    2:33
  • Guided course
    Double Angle Identities Example 2
    2:26

Law of Sines

  • Guided course
    Solving SSA Triangles ("Ambiguous" Case) Example 1
    4:02
  • Guided course
    Solving SSA Triangles ("Ambiguous" Case)
    9:50
  • Guided course
    Solving SAA & ASA Triangles
    7:23

Law of Cosines

  • Guided course
    Solving SAS & SSS Triangles
    7:50
  • Guided course
    Intro to Law of Cosines
    4:35