Trigonometric Identities Teacher Resources

Find Trigonometric Identities lesson plans and worksheets
Showing 1 - 24 of 942 resources
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Trigonometric Ratios with a Calculator: Lesson

For Students 9th - 12th Standards
Calculators ... they are more efficient than tables. Using two 30-60 right triangles, the segment of a playlist on geometry shows that trigonometric ratios for an angle are the same independent of the size of the triangle. The video...
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Worksheet 9: Trig Functions

For Teachers 12th - Higher Ed
In this math worksheet, students are given 7 problems in which they write expressions for trig functions, compute limits and graph functions.
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Inverse Trig Functions

For Students 10th - 11th
Learners solve and graph 10 different problems that are the inverses of various trig functions. First, they determine which equation is equivalent to a given equation. Then, they find an angle of a right triangle, given its leg lengths....
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Trigonometric Ratios: A Geometer's Perspective

For Teachers 9th - 11th Standards
What do all right triangles have in common? Young mathematicians investigate the trigonometric ratios in relation to right triangles. Their investigations lead to a hypothesis they use to determine unknown lengths in different triangles. 
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Exact Trigonometric Ratios: Triangles to the Unit Circle

For Teachers 9th - 12th Standards
Special right triangles give special information. Individuals learn how to find trigonometric ratios in all quadrants. This involves using special right triangles and the Pythagorean Theorem.
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EngageNY

Proving Trigonometric Identities

For Teachers 10th - 12th Standards
Young mathematicians first learn the basics of proving trigonometric identities. They then practice this skill on several examples.
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The Trigonometric Ratios: Lesson

For Students 9th - 12th Standards
SOH, 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,...
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Intro to Trigonometric Ratios

For Students 9th - 12th Standards
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...
1 In 1 Collection
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Trigonometric Identities and Laws

For Teachers 10th - 12th Standards
Your learners will appreciate this handy resource when they are working with various trigonometry problems. The most common trigonometric identities and laws are all typed on one page.
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6.5 Skill Builder: Trigonometric Identities

For Students 9th - 12th
In this trigonometric identities worksheet, students solve 16 multi-part short answer problems. Students use the quotient identity and Pythagorean identity to simplify trigonometric expressions. Students factor trigonometric expressions.
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Discovering Trigonometric Ratios

For Teachers 9th - 12th Standards
Are there equivalent ratios in right triangles? The discovery lesson plan has the class find the ratios of sides of right triangles with equivalent angle measurements. Using these ratios, pupils discover that particular ones are the...
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Inverse Trigonometric Ratios: Lesson

For Students 9th - 11th Standards
Finding 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...
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Trig Functions

For Students 11th - 12th
In this trig functions activity, students solve and complete 24 different types of problems. First, they find the limits for each trig function given. Then, students find xso that the given infinities series converges. They also find the...
8 Items in Collection
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Graphing Trig Functions

For Teachers 9th - 12th Standards
Going from simple trig functions to their graphs can seem like a daunting task. These resources show the steps to connect evaluating the functions to graphing them. The collection has a variety of resource types for you to explore. 
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Are You Pulling My Trig?

For Teachers 9th - 12th Standards
Build on students' knowledge about triangles with this introductory lesson on trigonometric ratios. After first exploring key terms in a scavenger hunt activity, students solve a series of guided and independent practice problems dealing...
EngageNY

The Definition of Sine, Cosine, and Tangent

For Students 9th - 10th Standards
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. 
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Worksheet #2: Trigonometric Ratios

For Students 9th - 12th
In this trigonometric ratios worksheet, students use trigonometric ratios to complete indirect measurement word problems.  This three-page worksheet contains 3 problems.
1 In 1 Collection
EngageNY

Basic Trigonometric Identities from Graphs

For Students 10th - 12th Standards
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...
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Trigonometric Ratios

For Students 10th
In this trigonometric ratios worksheet, 10th graders solve 9 different problems that include determining the trigonometric ratios of each triangle. First, they determine the sides and angles of a right triangle that is shown in each...
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Trig Identities

For Students 12th - Higher Ed
In this trig identities worksheet, students solve and complete 25 various types of problems. First, they assume that sine and cosine are given as stated. Then, students express the stated quantities in terms of a and b for each problem...
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Trigonometric Ratios

For Students 9th - 10th
In this trigonometric ratios learning exercise, learners find the sine, cosine and tangent of given triangles. Students determine the angle measurement or length of one side of a triangle. This two-page learning exercise contains 43...
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Trigonometric Ratios

For Students 11th
In this trigonometric ratios instructional activity, 11th graders solve and complete 15 different types of problems. First, they use the unit circle to sketch the line through an angle with a given measure. Then, students find the...
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Basic Trigonometric Ratios

For Teachers 11th - 12th
In this trigonometric ratio worksheet, students determine the length of a side of a right triangle, or the measurement of angles using trigonometric ratios. This one-page worksheet contains 24 problems. Answers are provided at the bottom...
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Proof of Identity

For Teachers 9th - 12th Standards
Students explore trigonometric identities.   In this Algebra II lesson, students use graphing to verify the reciprocal identities.  Using Cabri Jr, students investigate the Pythagorean trigonometric identities and the geometric c proofs...