Unit Plan
CK-12 Foundation

Ck 12: Flex Book: Trigonometry

For Teachers 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Six-chapter book that introduces students to trigonometry. Topics include right angles, circular functions, trigonometric identities, vectors, and polar equations.
Lesson Plan
TeachEngineering

Teach Engineering: Handheld Trigonometry

For Teachers 9th - 10th Standards
In addition to understanding the concept of similar right triangles and how they apply to trigonometric ratios, students explore a clinometer app, and discover how it can be used to test the mathematics underpinning trigonometry.
Website
Oswego City School District

Regents Exam Prep Center: Teaching Strategies for Algebra 2 & Trigonometry

For Students 9th - 10th
The mathematics lesson plans consist of teaching strategies and activities for algebra, geometry, and trigonometry. Some strategies included are teaching in block scheduling, working with lower ability students, and planning curriculum....
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Properties of Triangles

For Students 9th - 10th Standards
This lesson focuses on the properties of triangles, a closed shape that has three sides, three vertices, and and three internal angles. There are different types of triangles such as a right triangle, obtuse, and acute based on the...
Lesson Plan
Teachnology

Teachnology: Math Lesson Plans

For Teachers 9th - 10th
Great lesson plans covering a wide-range of math-related subjects.
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Trigonometry

For Students 9th - 10th
This lesson focuses on trigonometry including the trigonometric functions: sine, cosine, and tangent.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Heron's Formula

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] This lesson covers Heron's Formula and problem solving using trigonometry.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Trigonometry Word Problems

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Use trigonometry to solve word problems.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Introduction to the Triangle Area Formula

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers how to find the area of a triangle using sine.
Activity
Math Is Fun

Math Is Fun: Trigonometry

For Students 9th - 10th Standards
Students explore trigonometry concepts through this collection of definitions, lessons, examples problem-solving steps and strategies, and practice problems. Topics include solving triangles, trigonometric functions, theorems, and the...
eBook
Math Planet

Math Planet: Algebra 2: Trigonometry: Trigonometric Identities

For Students 9th - 10th Standards
Provides an explanation, examples, and a video lesson all related to trigonometric identities. [2:31]
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Applications

For Students 9th - 10th Standards
This lesson focuses on the real world applications using triangles and trigonometry.
Handout
Math Medics

S.o.s. Math: Trigonometry: The Addition Formulas

For Students 9th - 10th Standards
This math lesson contains a list of trigonometric addition formulas. Includes example problems involving these formulas along with solutions.
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Triangles Congruence

For Students 9th - 10th Standards
This lesson focuses on triangle congruence; it shows the ways to prove that triangles are congruent.
Handout
Purple Math

Purplemath: Practical Algebra Lessons

For Students 9th - 10th Standards
Pre-Algebra and algebra lessons, from negative numbers through Pre-Calculus. Grouped by level of study. Lessons are practical in nature, informal in tone, and contain many worked examples and warnings about problem areas and probable...
Unit Plan
Oswego City School District

Regents Exam Prep Center: Trigonometric Ratios

For Teachers 9th - 10th
A collection of lessons and practice exercises on trigonometric ratios. Students will learn how to solve for an angle and for a side, and to apply trigonometry in setting up and solving word problems.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Inverses of Trigonometric Functions

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to find the domain and range of inverse trigonometric functions by utilizing the reflection principle.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Pythagorean Theorem for Solving Right Triangles

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson applies the trigonometric ratios and their inverses to real-life situations.
eBook
Math Planet

Math Planet: Pre Algebra: Trigonometry

For Students 9th - 10th
Learn about trigonometry by viewing examples and a video lesson.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Law of Sines

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson introduces the Law of Sines for two cases.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Proofs of Trigonometric Identities

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson uses trigonometric identities to prove other identities.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Rectangular to Polar Conversions

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] This lesson introduces Polar coordinates.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Secant, Cosecant, and Cotangent Functions

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers secant, cosecant, and cotangent.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Trigonometric Equations Using Factoring

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving trigonometric equations using factoring, square roots, and the quadratic formula.