# Trigonometric Ratio Teacher Resources

Find Trigonometric Ratio lesson plans and worksheets

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Flipped Math

#### Inverse Trig Ratios

Put trigonometric ratios into inverse. Scholars learn how to find an unknown angle in a right triangle by using inverse trigonometric ratios. The pupils understand how the inverses undo a trigonometric ratio to provide the angle measure....

Flipped Math

#### Trig Ratios

Take ratios of sides to a new level. Pupils learn the definitions of the three basic trigonometric ratios in right triangles. Using the definitions, scholars find missing lengths in right triangles, based on a known angle. Individuals...

Curated OER

#### Trig Ratios of General Angles

In this trig ratios worksheet, students determine the angle measurement of trigonometric ratios. They find the value of trigonometric function. This approximately four-page worksheet contains 24 problems. Answers are provided on the last...

Curated OER

#### How Do You Find the Cosine of an Angle in a Right Triangle?

What's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find cosine(A) in the given right triangle. Use the ratio of the adjacent side divided by the hypotenuse to find cos(A). The instructor...

Curated OER

#### How Do You Find the Tangent of an Angle in a Right Triangle?

What's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find tangent(A) in the given right triangle. Use the ratio of the opposite side divided by the adjacent side to find tan(A). The...

Curated OER

#### How Do You Find a Missing Side of a Right Triangle Using Sine?

What's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find sin(A) in the given right triangle. Use the ratio of the opposite side divided by the hypotenuse to find sin(A). The instructor...

Curated OER

#### Basic Trigonometric Ratios

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...

FuseSchool

#### Exact Trig Values - Easy Table

Having trouble remembering the trig ratios of common angles? This resource may be the solution! Using a table, the video instructor describes a memorable pattern. Scholars have an opportunity to practice the pattern during the video.

FuseSchool

#### SOHCAHTOA - Finding Missing Angles

Apply the trig ratios to find unknown angle measures. Learners review the side and angle relationships in right triangles and then apply the ratios to find the angle measures. The video shows several worked-out examples applying all...

Curated OER

#### Finding Trigonometric Ratios

For this finding trigonometric ratios worksheet, 11th graders solve and complete 22 various types of problems. First, they find the value of each trigonometric ratio to the nearest ten-thousandth. Then, students use a calculator to find...

Curated OER

#### How are Trig Ratios Used to Measure Triangle Sides

Students identify the ratios of trig identities. In this geometry instructional activity, students solve the missing sides and angles of triangles using trig ratios. They relate the graphs and waves to real life scenarios.

Curated OER

#### How Do You Find the Sine of an Angle in a Right Triangle?

A trigonometric ratio is a ratio between two sides of a right triangle. In this problem, find sin(A) in the given right triangle. Use the ratio of the opposite side over the hypotenuse.

Curated OER

#### Trigonometry Ratios in Right Triangles

In this trigonometry ratios in right triangles learning exercise, 10th graders solve 10 different trigonometric ratios that apply to right triangles. First, they define a trigonometric ratio and its three most common ratios, sine,...

Curated OER

#### Review of Trig Ratios

For this trigonometric ratios worksheet, students solve and complete 10 various types of problems. First, they write the degrees listed in radian measure. Then, students find the exact ratios for each equation. They also find the value...

Curated OER

#### Mnemonics to Remember Your Trig Ratios

In this calculus worksheet, students review mnemonic rhymes to help them remember the different ratios of sine, cosine and tangent. They are funny and memorable for any grade level.

EngageNY

#### Trigonometry and the Pythagorean Theorem

Ancient Egyptians sure knew their trigonometry! Pupils learn how the pyramid architects applied right triangle trigonometry. When comparing the Pythagorean theorem to the trigonometric ratios, they learn an important connection that...

CK-12 Foundation

#### Reciprocal Identities

Get a better understanding of the trigonometric functions by taking a look at the flip side. Pupils create angles within a unit circle and compare the values of the standard trigonometric functions to their reciprocal functions. The...

FuseSchool

#### SOHCAHTOA - Finding Missing Sides Part 1

Explore the meaning and application of the three trigonometric ratios. A thorough video reviews the trig ratios and then shows how to apply them in triangle problems. The instructor demonstrates several examples finding both side and...

CK-12 Foundation

#### Double Angle Identities: Ferris Wheel

Use a Ferris wheel to soar to new heights of understanding on double angle identities. Here is an interactive that applies an example of a Ferris wheel to show how doubling the angle does not double the value of a trigonometric ratio....

3Blue1Brown

#### Derivative Formulas Through Geometry | Essence of Calculus, Chapter 3

Geometry to the rescue. By watching a video, scholars see how geometric concepts help explain derivative formulas: areas of rectangles and volumes of rectangular prisms for the Power Rule and similarity and trig ratios for the Sine Rule.

FuseSchool

#### SOHCAHTOA - Finding Missing Sides Part 2

Explore some right triangle trigonometry with a straightforward video lesson. The instructor presents problems requiring scholars to use trig ratios to find unknown side measures. She provides worked-out solutions for those needing...

Curated OER

#### Sine, Cosine, and Tangent Ratios

In this ratios learning exercise, 11th graders solve and complete 8 various types of problems. First, they read each problems and draw a sketch for each. Then, students write a trigonometric ratio for each problem and round any decimal...

Curated OER

#### How Do You Solve a Problem Using an Angle of Elevation?

In this problem you are given an angle of elevation and one side of a right triangle to find a missing side. Watch the instructor explain how to use the tangent ratio formula to solve this problem.

Curated OER

#### Finding the Area of an Equilateral Triangle

The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle...