+
Interactive
CK-12 Foundation

Finding Exact Trigonometric Values Using Double Angle Identities: Trig Values Using Double and Half Angle Formulas

For Students 10th - 12th
The more you know, the more you can learn. Scholars apply the double angle and half angle formulas to determine trig values based on known values. They use an interactive that provides sine and cosine values to aid calculations.
+
Interactive
CK-12 Foundation

Half Angle Formulas: Half-Angle Formulas

For Students 10th - 12th
Slide the resource into your lesson plans. Young mathematicians use a slider to move a movie screen to the right position for optimal viewing. Along the way, they learn to apply the half angle formulas.
+
Worksheet
Curated OER

Half Angle Formula

For Students 9th - 11th
In this half angle formula activity, students use half angle formulas to find the value of given angles. This one-page activity contains 1 multi-step problems.
+
Lesson Plan
EngageNY

Addition and Subtraction Formulas 2

For Teachers 11th - 12th Standards
Knowing the addition formulas allows for the calculations of double and half formulas. The fourth installment of 16 has the class use the addition formula to develop the double angle trigonometric formulas. Using the double formula,...
+
Assessment
EngageNY

Mid-Module Assessment Task: Pre-Calculus Module 4

For Students 11th - 12th Standards
Challenge scholars to show what they know about properties and addition and subtraction formulas for trigonometric functions. The resource provides a mid-unit check on the progress toward mastery of trigonometric concepts. The areas...
+
Worksheet
Curated OER

Trigonometric Identities

For Students 11th - 12th
In this trigonometry worksheet, students solve and analyze the reciprocal, quotient, Pythagorean and Cofunction Identities. They also discuss sum and difference identities, double angle and half angle identities.
+
Worksheet
Curated OER

Interior and Exterior Angles of Polygons

For Students 10th
In this angles of polygons instructional activity, 10th graders solve and complete 18 different problems that include determining various interior and exterior angles. First, they determine the measure of various angles described in the...
+
Worksheet
Curated OER

Angle Sum and Difference

For Students 11th
In this angle sum and difference learning exercise, 11th graders solve 10 different problems related to determining the angle sum and difference of numbers. First, they determine the exact value of sine and cosine degrees. Then, students...
+
Lesson Plan
Illustrative Mathematics

Seven Circles III

For Teachers 9th - 11th Standards
A basic set-up leads to a surprisingly complex analysis in this variation on the question of surrounding a central circle with a ring of touching circles. Useful for putting trigonometric functions in a physical context, as well as...
+
Lesson Plan
Curated OER

Integrals with Even Powers of Sine and Cosine

For Teachers 11th - 12th
Students discuss ways to integrate given trigometric functions. They use a trig identity (half angle identities) to solve problems. Students practice solving problems with even powers of both sine and cosine. They change a sum of...
+
Lesson Plan
Curated OER

Identities and Trigonometric Values

For Teachers 9th - 11th
Students solve trigonometric equations. In this precalculus lesson, students prove trigonometric identities using the Pythagorean Theorem. They apply the addition formulas for sine and cosine to prove different identities.
+
Lesson Plan
EngageNY

Using Trigonometry to Determine Area

For Students 9th - 10th Standards
What do you do when you don't think you have enough information? You look for another way to do the problem! Pupils combine what they know about finding the area of a triangle and trigonometry to determine triangle area when they don't...
+
Lesson Plan
Curated OER

Physics Lab Rockets

For Teachers 10th - 12th
Students construct and test balloon rockets and a model rocket. In this rocket science lesson, students use an inquiry-based method to master balloon rockets and have a shoot-off with the goal of attaining the highest altitude. Next,...
+
Worksheet
Curated OER

Trigonometric Functions

For Students 11th - 12th
For this trigonometric functions worksheet, learners solve and complete 35 various type of problems. First, they find the values for all six trig functions that pass through the given points. Then, students prove different identities as...
+
Handout
1
1
Curated OER

Math Handbook: Trigonometry

For Students 9th - 12th Standards
You'll be spinning in unit circles once you read through this jumbo-sized resource of everything you need to know about trigonometry. Each page has color-coded examples with explicit directions that detail the problems and formulas. 
+
Worksheet
Curated OER

Chapter 6: Geometry Perimeter and Area

For Students 10th - 12th
In this perimeter and area worksheet, students find the perimeter of various polygons.  They compute the perimeter, surface area, circumference, and volume of given figures.  Students explore trigonometric ratios.  This twelve-page...
+
Lesson Plan
Curated OER

Trigonometry - Week 9

For Teachers 10th - 12th
For this trigonometry worksheet, students use the sum-to-product formula, and the law of sines and cosines to solve trigonometry problems. This two-page worksheet contains eight problems.
+
Lesson Plan
Curated OER

Design - Lettering

For Teachers 6th - 12th
Students, using the concepts of radial design and balance, create a project that focuses on craftsmanship, lettering, promoting a positive self-image, and design elements.