Trigonometric Identities Teacher Resources
Find Trigonometric Identities lesson plans and worksheets
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Intro to Trigonometric Ratios
Finding trigonometric ratios is relatively easy; you just have to know where to look. The first installment of a 16-part video playlist shows how to find the sine, cosine, and tangent values for a given angle. It shows how to find the...
4 mins 9th - 12th CCSS: Adaptable
The Trigonometric Ratios: Lesson
New ReviewSOH, what is this thing called trigonometric ratios? A section of an extensive playlist on geometry identifies the adjacent and opposite sides in relationship of an angle. Using the identified sides, the video defines the sine, cosine,...
6 mins 9th - 12th CCSS: Adaptable
Inverse Trigonometric Ratios: Lesson
New ReviewFinding the inverse of trigonometric ratios is not the same as finding the reciprocal. The presentation introduces how to find the angle of a right triangle given sides. Part of a larger playlist on geometry, the video uses the inverse...
5 mins 9th - 11th CCSS: Adaptable
The Definition of Sine, Cosine, and Tangent
Introduce your classes to a new world of mathematics. Pupils learn to call trigonometric ratios by their given names: sine, cosine, and tangent. They find ratios and use known ratios to discover missing sides of similar triangles.
9th - 10th CCSS: Designed
Basic Trigonometric Identities from Graphs
Have young mathematicians create new identities! They explore the even/odd, cofunction, and periodicity identities through an analysis of tables and graph. Next, learners discover the relationships while strengthening their understanding...
10th - 12th CCSS: Designed
EngageNY Algebra II: Module 2
Building on young mathematicians' prior knowledge of geometry and algebraic functions, this 17-lesson unit introduces the topic of trigonometric ratios. Starting with the basic definitions of sine, cosine, and tangent, students move on to investigate the graphs of these functions and their use in modeling real-world situations.
10th - 12th
Indirect Measurement Technique: Using Trigonometric Ratios
Students explore the concept of trigonometric ratios. In this trigonometric ratios lesson, students use trigonometric ratios and the angle of elevation/depression to determine the height of an object. Students use their clinometer made...
9th - 12th
Section 8-6: Solving Problems Using Trigonometric Ratios
For this trigonometric ratios worksheet, students solve 20 short answer and multiple choice problems. Students use trigonometric ratios, the angle of depression, and angle of elevation to find missing side lengths of angles of a triangle.
9th - 12th