Zeihen RMHS 605
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  • Algebra 2
    • Unit 1: Rational Numbers and Polynomial Expressions >
      • Unit 1 Segment 1: Structure in Expressions >
        • Lesson 1-1 Properties of Real Numbers
        • Lesson 1-2 Algebraic Expressions
        • Algebra 1 Ch 7 Lesson: Rules of Exponents
        • Lesson 6-1 Polynomial Functions
        • Lesson 6-1 Exploring Polynomial Functions
        • Lesson 1-3 Solving Equations
        • Lesson 6-1 Multiplying Polynomials
        • Lesson 5-4 Factoring Techniques
        • Other Factoring Techniques
        • 5-5 Quadratic Graphing and their Zero's
        • 6-2 Polynomials and their Linear Factors
        • 6-2 The Factor Theorem, Zeros, and Multiplicity
        • 6-3 Dividing Polynomials, Synthetic Division, Remainder Theorem
        • 6-3 Synthetic Divsion
      • Unit 1 Segment 2: Polynomial Arithmetic >
        • Lesson 5-8 The Quadratic Formula
        • 6-4 Solving Polynomial Equations with Quadratic Techniques
        • 6-5 Theorems about Roots of Polynomial Equations
      • Unit 1 Segment 3: Binomial Theorem & Pascal's Triangle >
        • Lesson 6-7 Permutations
        • Lesson 6-7 Combinations
        • 6-8 Pascal's Triangle and the Binomial Expansion Theorem
    • Unit 2: Equations and Their Graphs >
      • Unit 2 Segment 1: Reasoning With Equations & Inequalities >
        • Lesson 9-3 Graphing Rational Equations
        • Lesson 9-4 Solving Simple Rational Equations
        • Lesson 2-5 Graphing Absolute Value Functions
        • Lesson 1-5 Solving Absolute Value Equations
      • Unit 2 Segment 2: Solve Equations Graphically
    • Unit 3: Complex Numbers >
      • Unit 3 Segment 1: Complex Number Operations >
        • 5-6 Complex Numbers and Conujates
        • 5-6 Graphing Complex Numbers, Absolute Value and Conjugates
      • Unit 3 Segment 2: Complex Numbers in Quadratic Equations
    • Unit 4: Trigonometric Functions >
      • Unit 4 Segment 1: The Unit Circle, Radians, and Degrees >
        • Lesson on Special Right Triangles
        • Basic Trig Ratios Reviewed
        • Ferris Wheel Exploration Day 1
        • Ferris Wheel Exploration Day 2
        • Lesson 13-2 Angles and the Unit Circle
        • Lesson 13-3 Radian Measure
        • Lesson 13-2 The Unit Circle
      • Unit 4 Segment 2: Graphing Trigonometric Functions >
        • Lesson 13-1 Periodic Functions
        • Lesson 13-4 Sine Graphs
        • Cosine Graphs
        • Tangent Graphs
      • Unit 4 Segment 3: Proving Trigonometric Identities >
        • Lesson 14-1 Trigonometric Identities
    • Unit 5: Modeling With Functions >
      • Unit 5 Segment 1: Graphing Functions
      • Unit 5 Segment 2: Interpreting Functions >
        • Lesson 1-3 Using Equations to Model Problems
        • Lesson 1-4 Using Inequalities to Model Problems
      • Unit 5 Segment 3: Comparing Functions
      • Unit 5 Segment 4: Functions and Their Inverses >
        • Lesson 7-7 Inverse and Functions
        • Lesson 8-3 Logarithm and Inverses of Exponential Functions
    • Unit 6: Inferences and Conclusions From Data >
      • Unit 6 Segment 1: Standard Deviation, Mean, & Normal Distribution
      • Unit 6 Segment 2: Random Process & Empirical Versus Theoretical
      • Unit 6 Segment 3: Sample Surveys, Experiments and Observational Studies
  • Alg 2 Honors SS Blog
  • Geometry
    • Unit 1 Foundations of Geometry >
      • Unit 1 Segment 1: Basic Geometric Figures >
        • Lesson 1-3 Points, Lines & Planes
        • Lesson 1-4 Segments, Rays, Parallel Lines and Planes
        • Lesson 1-5 Measuring Segments
        • Lesson 1-6 Measuring Angles
      • Unit 1 Segment 2: Constructions >
        • Lesson 1-7 Basic Constructions
        • Making shapes with Constructions
      • Unit 1 Segment 3: Deductive Reasoning >
        • Lesson 1-1 Inductive Reasoning, "Patterns!"
        • Lesson 2-1 Conditional Statements
        • Lesson 2-2 Bi-Conditional Statements
        • Lesson 2-3 Deductive Reasoning "Logic"
        • Lesson 2-4 Reasoning in Algebra
        • Lesson 2-5 Vertical, Complementary, and Supplementary Pairs and AAP
        • Lesson 5-4 Negation with Inverse and Contrapositive Statements
    • Unit 2 Parallel Lines and Transformations >
      • Unit 2 Segment 1: Transformations >
        • Lesson 9-1 Transformations
        • Lesson 9-2 Reflections
        • Lesson 9-3 Rotations
      • Unit 2 Segment 2: Properties of Parallel Lines and Proving Lines are Parallel >
        • Lesson 3-1 Angles Formed by Parallel Lines
        • Lesson 3-2 Proving Lines Parallel
        • Lesson 3-3 Parallel and Perpendicular Lines
        • Lesson 3-8 Constructing Parallel and Perpendicular Lines
        • Writing Proofs involving Parallel Lines and Triangles
      • Unit 2 Segment 3: Triangle Angle Sum Theorem >
        • Lesson 3-4 Theorems about Angles in Triangles
        • Lesson 3-5 Interior Angles in Polygons
        • Lesson 3-5 Polygons and Shapes
    • Unit 3 Congruence >
      • Unit 3 Segment 1: Triangle Congruence Theorem with Transformations >
        • Lesson 4-1 Congruent Polygons and Transfomations
        • Lesson 4-2 Congruent Triangles SSS SAS
        • Lesson 4-3 Congruent Triangles ASA AAS
        • Lesson 4-4 Using Congruent Triangles & CPCTC
        • Lesson 4-5 Isosceles and Equilateral Triangles
        • Lesson 4-6 Congruence in Right Triangles HL Theorem
        • Lesson 4-7 Using Corresponding Parts of Congruent Triangles
      • Unit 3 Segment 2: Using Congruent Triangles to Prove Properties of Quadrilaterals >
        • Lesson 6-1 Classifying Quadrilaterals
        • Lesson 6-2 Properties of Parallelograms
        • Lesson 6-3 Proving that a Quadrilateral is a Parallelogram
        • Lesson 6-4 Special Parallelograms
        • Lesson 6-5 Trapezoids and Kites
      • Unit 3 Segment 3: Develop Area by Building Shapes from Triangles and Rectangles >
        • Lesson 10-1 Area of Parallelograms and Triangles
        • Lesson 10-2 Area of Trapezoids, Rhombuses, and Kites
        • Lesson 10-3 Area of Regular Polygons
    • Unit 4 Coordinate Geometry >
      • Unit 4 Segment 1: Introduction to Coordinate Geometry >
        • Lesson 1-8 Coordinate Plane, Distance, and Midpoint Formulas
      • Unit 4 Segment 4: Slope of Parallel and Perpendicular Lines >
        • Lesson 3-6 Slopes and Lines in the Coordinate Plane
        • Lesson 3-7 Slopes of Parallel and Perpendicular Lines
      • Unit 4 Segment 2: Pythagorean Theorem and its Applications >
        • Lesson 5-5 Inequalities in Triangles
        • Lesson 8-1 The Pythagorean Theorem
        • Lesson 1-9 Perimeter, Circumference, and Area
        • Lesson 6-6 Placing Figures in the Coordinate Plane
        • Lesson 6-7 Proofs Using Coordinate Geometry
      • Unit 4 Segment 3: Derive the Equation of a Circle Using Distance Formula & Pythagorean Theorem >
        • Lesson 12-5 Equation of a Circle
      • Unit 4 Segment 5: Parabolas >
        • Parabolas Using Focus and Directrix
    • Unit 5 Similarity >
      • Unit 5 Segment 1: Definition of Similarity using Dilations >
        • Lesson 7-1 Ratios and Proportions
        • Lesson 9-5 Dilations
        • Lesson 7-2 Similar Polygons
        • Lesson 7-3 Proving Triangles Similar
      • Unit 5 Segment 2: Applications of Similarity in Triangles >
        • Lesson 7-5 Proportions in Triangles
        • Lesson 5-1 Midsegments in Triangles
        • Lesson 5-3 Concurrent Lines, Medians and Altitudes
        • Lesson 8-6 Vectors or scalar multiplication
    • Unit 6 Trigonometry >
      • Unit 6 Segment 1: Special Right Triangles and the Pythagorean Theorem >
        • Lesson 8-2 Special Right Triangles
        • Lesson 8-2 Special Right Triangles
      • Unit 6 Segment 2: Trigonometry Ratios and Similarity >
        • Lesson 8- 3 Tangent in Right Triangles
        • Lesson 8-4 Cosine
        • SOHCAHTOA
        • Lesson 8-3 The Tangent Ratio
        • Lesson 8-4 Sine and Cosine Ratios
      • Unit 6 Segment 3: Trigonometry Identities >
        • Lesson 8-5 Trig Identities, Angles of Elevation and Depression
      • Unit 6 Segment 4: Laws of Sines and Cosines and Applications >
        • Lesson on Law of Sines
        • Lesson on Law of Cosines
        • Lesson 10-5 Area of Regular Polygons and Trigonometry
    • Unit 7 Circles >
      • Unit 7 Segment 1: Introduction to Circles and Similarity
      • Unit 7 Segment 2: Angle Measures and Segment Lengths in Circles >
        • Lesson 10-6 Circles and Arcs
        • Lesson 12-2 Chords, Arcs, and Angles
        • Lesson 12-2 Chords in Circles
      • Unit 7 Segment 3:Angle Properties of Inscribed and Circumscribed Circles about Triangles and Quadrilaterals >
        • Lesson 10-7 Area and Sectors in Circles
        • Lesson 12-3 InscribedAngles and Intercepted Arcs in the Circle
        • Lesson 12-4 Angles formed by Secants in the Circle
        • Lesson 12-4 Angles formed by Secants outside the Circle
      • Unit 7 Segment 4: Relationships of Sectors and their Areas >
        • Lesson 10-6 Circumference and Arclength in Circles
        • Lesson 10-7 Areas of Circles and Sectors
    • Unit 8 Surface Area and Volume >
      • Unit 8 Segment 1: Derivation of Area and Volume Formulas
      • Unit 8 Segment 2: Applications of Volume Formulas
      • Unit 8 Segment 3: Cross Sections and Transformations
    • Unit 9 Probability >
      • Unit 9 Segment 1: Independent and Conditional Probability
      • Unit 9 Segment 2: Computing Probability of Compound Events
      • Unit 9 Segment 3: Applications of Probability
  • Geometry Blog
  • Algebra 2 Blog
  • Parent Resources
  • Algebra 1
    • Unit 1 Relationships Between Quantities and Reasoning with Equations >
      • Unit 1 Segment 1: Parts of Equations
      • Unit 1 Segment 2: Solving and Modeling Equations, Justify >
        • Solving Multi-Step Equantions and Inequalities
      • Unit 1 Segment 3: Solving and Model Inequalities
      • Unit 1 Segment 4: Graph Equations and Inequalities >
        • Modeling Word Problems
    • Unit 2 Linear and Exponential Relationships >
      • Unit 2 Segment 1: Properties of Functions >
        • Function, Tables, and Graphs
        • Transformations
        • Linear Equations and Graphing
      • Unit 2 Segment 2: Systems >
        • Solving Systems of Equations
    • Unit 3 Descriptive Statistics >
      • Unit 3 Segment 1: Box Plots
      • Unit 3 Segment 2: Scatter Plots
    • Unit 4: Expressions and Equations >
      • Unit 4 Segment 1: Polynomials >
        • Properties of Exponents and Radicals
        • Polynomials
    • Unit 4 Segment 2: Quadratic Operations
    • UNIT 5 Quadratic Functions and Modeling >
      • Unit 5 Segment 1: Quadratic Functions >
        • Graphing Quadratic Equations
        • Solving Quadratic Equations
      • Unit 5 Segment 2: Modeling Functions >
        • Rational Expressions
  • Extra Credit
  • Algebra 1 Blog
  • CAHSEE PREP
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Lesson 14-1 Trigonometric Identities
Watch a video on Verifying trigonometric identities.
Do You OWN it?

Take a Lesson quiz on 14-1 Trigonometric Identities.
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