Handout
Purple Math

Purplemath: Solving Simple (To Medium Hard) Trig Equations

For Students 9th - 10th Standards
Introduces techniques for solving trigonometric equations. Provides worked examples of solving some simpler to medium-hard equations.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Trigonometric Equations Using Factoring

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving trigonometric equations using factoring, square roots, and the quadratic formula.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometric Equations Using Half Angle Formulas

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to solve trigonometric equations using the half angle formulas.
Handout
Windstream

Ojk's Precalculus Study Page: Easier Trigonometric Equations

For Students 9th - 10th Standards
An introduction to solving trigonometric equations, including finding general and particular solutions. The connection between the tangent function and the slope of a line is also covered. Includes several examples and graphs.
Activity
BBC

Bbc: Radians and Equations

For Students 9th - 10th
BBC provides a tutorial that explains how radians are related to degrees and demonstrates how to solve trig equations in radian units. Examples and a practice test are available.
Activity
Math Medics

S.o.s. Math: Solving Equations

For Students 9th - 10th Standards
This tutorial explains how to solve a variety of equations, from simple to complex, and gives examples and solutions. Students are asked to solve for x before looking at a solution.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Applications of Inverse Trigonometric Functions

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to apply inverse trig functions to solve problems you would see in real-life situations.
Activity
Paul Dawkins

Paul's Online Notes: Algebra & Trig Review

For Students 9th - 10th Standards
The tutorial reviews algebra and trigonometric topics needed in Calculus. Topics examined are solving equations, rational expressions, absolute value, solving trigonometric functions, exponentials, and logarithms. Class notes,...
Unit Plan
Oswego City School District

Regents Exam Prep Center: Trigonometric Ratios

For Teachers 9th - 10th
A collection of lessons and practice exercises on trigonometric ratios. Students will learn how to solve for an angle and for a side, and to apply trigonometry in setting up and solving word problems.
Unknown Type
Khan Academy

Khan Academy: Sinusoidal Models Word Problems

For Students 9th - 10th
Solve word problems that involve real-world contexts that are modeled by sinusoidal functions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Paul Dawkins

Paul's Online Notes: Calculus I: Review

For Students 9th - 10th Standards
Learners review the algebra and trigonometric skills needed in a Calculus course. Topics investigated are solving trigonometric equations, logarithmic functions, exponential functions, functions, and common graphs. Class notes,...
Handout
Windstream

Ojk's Precalculus Study Page: More Difficult Trig Equations

For Students 9th - 10th Standards
An introduction to solving trigonometric equations by using the reciprocal, negative, Pythagorean, and cofunction identities. Includes several examples and exercises with solutions at the bottom of the page.
Handout
Purple Math

Purplemath: Proving Trigonometric Identities

For Students 9th - 10th
An "identity" is a tautology, an equation or statement that is always true, no matter what. Proving an identity is very different in concept from solving an equation. This resource demonstrates some useful techniques for proving...
Unknown Type
Khan Academy

Khan Academy: Trigonometry: Evaluate Inverse Trig Functions

For Students 9th - 10th Standards
Given a sine, cosine, or tangent value, find the principle angle that has this value. In other words, find the arcsine, arccosine, or arctangent of that value. Students receive immediate feedback and have the opportunity to try questions...
Activity
Math Medics

S.o.s. Math: Algebra

For Students 9th - 10th Standards
This lesson provides basic instruction on the major concepts in algebra. Content includes a focus on fractions, units of conversion, complex numbers, quadratic equations, factorization and roots of polynomials, solving equations, systems...
Activity
Texas Instruments

Texas Instruments: Kinematics Investigation

For Teachers 9th - 10th
In this activity, students solve trigonometric equations and investigate kinematics. They calculate and graph the displacement, velocity, and acceleration of trigonometric functions.
Handout
Wikimedia

Wikipedia: Trigonometric Function

For Students 9th - 10th
This page from Wikipedia, a free and open-source encyclopedia, covers how to solve a variety of trigonometric equations, most of which involve substitution with a trigonometric identity. The identities themselves are not covered, but...
Activity
Other

Math Mistakes: Common Trigonometry Mistakes

For Students 9th - 10th
Learn from other student's mistakes by reviewing examples of the following Trigonometry topics: values of trigonometric functions, values of inverse trigonometric functions, solving triangles, simplifying trigonometric expressions, and...
Activity
Texas Instruments

Texas Instruments: Solving Problems Using Trigonometry

For Teachers 9th - 10th
Solving real life problem using trig ratios. Example: Finding the angle of elevation or the angle of depression. Finding the angle between two lines. Finding equation of a line that passes through two points.
Article
Mocomi & Anibrain Digital Technologies

Mocomi: What Is an Equation?

For Students 2nd - 8th Standards
Explains the different types of equations and provides examples to solve.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Equations Using De Moivre's Theorem

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Solve equations using DeMoivre's Theorem
Activity
Math Is Fun

Math Is Fun: Solving Triangles

For Students 9th - 10th Standards
Find guidelines to help you "solve" triangles, which means finding the value of missing sides and angles. Provided are examples of six scenarios in which you can solve a triangle's missing measurements, as well as relevant equations,...
Unknown Type
Windstream

Ojk's Precalculus Study Page: Trigonometry Sample Test

For Teachers 9th - 10th Standards
A practice test that covers proving trigonometric identities and solving advances trigonometric equations.
Activity
Texas Instruments

Texas Instruments: Using Derive

For Teachers 9th - 10th Standards
In this activity, students use the Derive software to solve trigonometric equations, expressions with exponentials, and log equations. They also determine the equation of tangent and normal of a function; evaluate integrals, find area...