####
Now... gain access to over
**2 Million**
curated educational videos and
**500,000**
educator reviews to free & open educational resources

### We found 178 resources with the keyterm cosine

Videos (Over 2 Million Educational Videos Available)

6:54

How to paint a watercolor and ink flower...

6:09

Three-Dimensional Coordinates and the...

3:42

The Secret World of Animal Sleep 101...

Other Resource Types ( 178 )

Lesson Planet

#### The unit circle definition of trigonometric function

In this video, Sal shows how the sine and cosine of an angle are defined on the unit circle. He inscribes a 30-60-90 triangle in the unit circle and explains how one can use SOH-CAH-TOA to find the coordinates on the circle.

Lesson Planet

#### Basic Trigonometry ll

Sal continues with examples of finding the sine, cosine, and tangent of an angle in a right triangle using SOH-CAH-TOA. In his examples, he reviews the use of the Pythagorean Theorem and rationalizing the denominator of a fraction. He...

Lesson Planet

#### Intro to the Trigonometric Ratios

This video introduces the basics of trigonometry. It starts by defining a right triangle and showing two different examples of finding the ratios of sine, cosine, and tangent using the SOH-CAH-TOA mnemonic. This resource could be used as...

Lesson Planet

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

Trigonometry? What's trigonometry. Well, something to do with triangles, right? Right! Right triangles! In this problem, find the missing length of one of the sides. So set this up as a ratio: cosine(A) = adjacent side length divided by...

Lesson Planet

#### Sin Cos Tan - Basic Trigonometry

Trigonometry learners can get confused about the relationships in a right triangle. This video clearly lays out how to solve for the length of one side of a triangle using cosine. Though not engaging, it is educational. Have your...

Lesson Planet

#### Calculus Worksheet

In this calculus learning exercise, students solve 10 different problems that include determining the first derivative in each. First, they apply properties of logarithmic functions to expand the right side of each equation. Then,...

Lesson Planet

#### Trigonometry

Students identify the different ratios of a right triangle. In this trigonometry lesson, students calculate the sine, cosine and tangent of a right triangle. They differentiate between right and oblique triangles.

Lesson Planet

#### Does Your Field Measure Up

Young scholars measure angles using a plane table kit. In this geometry lesson, students use trigonometric identities to find the values of the length of a football field.

Lesson Planet

#### Polar Functions

Explore the concept of polar functions and learn how to determine the length around a function using polar coordinates. High schoolers use their Ti-calculators to determine the length of a function that looks like a five-leaved rose....

Lesson Planet

#### 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...

Lesson Planet

#### Adjacent Right Triangle Problems

The instructor identifies the terms used to solve for the angle of adjacent right triangles. He does not have an example to solve a problem.

Lesson Planet

#### Trigonometric Functions

Here is a worksheet that includes three short trigonometry problems. Learners must use trigonometric definitions and identities to solve. Use this resource to review trigonometry, or as an assessment.

Lesson Planet

#### Sine, Cosine, and Tangent Ratios

In this ratios worksheet, 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 answers...

Lesson Planet

#### Quadrantal Angles

In this quadrantal angle worksheet, students determine the six trigonometric for each quadrant angle. This one-page worksheet contains 36 problems, with answers printed at the bottom of the page.

Lesson Planet

#### Worksheet 4 - Math 126: Sketching Polar Equations

In this sketching polar equations instructional activity, learners solve 5 short answer and graphing problems. Students describe a curve given the equation of the curve in polar form. Learners sketch a graph of the equation.

Lesson Planet

#### Triginometry: Find the Unknown Side

In this Trigonometry worksheet, learners use the Pythagorean theorem to calculate the length of side x. There are 5 questions to solve and submit.

Lesson Planet

#### Trigonometry Formula Worksheet

For this trigonometry worksheet, students solve right triangle problems. They find the sine, cosine and tangent of given triangles. This on-line, interactive worksheet contains 6 problems. Answers are provided.

Lesson Planet

#### Easy Worksheet: Trigonometry

In this trigonometry worksheet, students solve 4 short answer problems. Students find the sine, cosecant, secant or cotangent of an angle given a diagram of a right triangle with various measurements labeled.

Lesson Planet

#### 6.5 Skill Builder: Trigonometric Identities

For 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.

Lesson Planet

#### Applied Trigonometry Problems

For this applied trigonometry problems worksheet, students solve 12 short answer word problems. Students use trigonometric ratios to find angles of elevation and depression. Students find distances between objects using trigonometric...

Lesson Planet

#### Trigonometry

In this right triangles activity, students use trigonometric ratios to determine the length of a side of a triangle or a missing angle measurement. This two-page activity contains 20 problems.

Lesson Planet

#### Trigonometry Homework

In this right angles worksheet, students use trigonometric ratios to determine the length of a missing side or a missing angle of a right triangle. This two-page worksheet contains 19 problems.

Lesson Planet

#### Math 53 Worksheet: Parametric Equations

In this parametric equations learning exercise, students solve 8 short answer multi-step equations. Students find parametric equations to represent equations of circles. Students find arc length of parametrized curves.

Lesson Planet

#### Exercise Set 5.4: Inverse Trigonometric Functions

In this trigonometric functions worksheet, students solve 68 multi-part short answer and graphing questions. Students evaluate inverse trigonometric functions for a given value. Students graph inverse trigonometric functions.