Instructional Video6:53
Curated Video

Proving the Pythagorean Theorem Using Similarity

K - 5th
In this lesson, students will learn how to prove the Pythagorean theorem using similarity. By investigating and following a series of steps, they will discover that by cutting a right triangle and drawing altitudes, they can create...
Instructional Video2:58
Brian McLogan

Solve a trigonometric equation using the double angle formulas

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video3:47
Brian McLogan

Pre-Calculus - Find All of the Solutions of an Equation Using the Double Angle Formulas

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video3:15
Brian McLogan

Pre-Calculus - Determine the Double Angle of Sine When Given a Triangle and Restrictions

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video3:15
Brian McLogan

Evaluate an angle using the double angle of cosine from a triangle

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video4:29
Brian McLogan

Learn how to solve equation using double angle formula

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video0:57
Brian McLogan

Write an expression as a single function using the sum and difference formulas

12th - Higher Ed
👉 Learn how to write a given sum or difference of two angles formula expression as a single sum/difference of angles trigonometric function. To do this, we first identify the trigonometric function for which its sum/difference formula is...
Instructional Video2:59
Brian McLogan

Using the double angle formula for sine to solve the trigonometric function

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video4:31
Brian McLogan

Finding the exact value for sine of 15 degrees using the half angle formula

12th - Higher Ed
👉 Learn how to evaluate the Sine of an angle using the half-angle formula. The half-angle formula for Sine is helpful when you need to determine the exact value of function given an angle but cannot use a calculator or the angle is not...
Instructional Video5:48
Brian McLogan

How to find the exact value using the half angle formula for cosine

12th - Higher Ed
👉 Learn how to evaluate the Sine of an angle using the half-angle formula. The half-angle formula for Sine is helpful when you need to determine the exact value of function given an angle but cannot use a calculator or the angle is not...
Instructional Video1:43
Brian McLogan

Pre-Calculus - How to Evaluate Using the Double Angle Formula for Cosine

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video4:58
Brian McLogan

Algebra 2 - Find the Double Angle of Tangent To a Triangle, Sin v = 4/5

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video2:05
Brian McLogan

Pre-Calculus - Evaluating for the Double Angle of Sine with a Triangle

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video1:09
Brian McLogan

Write an expression as a single trigonometric function using sum and difference formula

12th - Higher Ed
👉 Learn how to write a given sum or difference of two angles formula expression as a single sum/difference of angles trigonometric function. To do this, we first identify the trigonometric function for which its sum/difference formula is...
Instructional Video2:12
Brian McLogan

Evaluate the double angle of sine from a triangle

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video2:05
Brian McLogan

Evaluate the double angle of cosine from a triangle

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video54:53
Brian McLogan

Double and Half Angle Formulas | Analytic Trig | Pre-Calculus

12th - Higher Ed
In this video we will explore how to use the double angle to evaluate trigonometric expressions from triangles as well as angles in degrees and radians. We will then use double angle formulas to help verify trigonometric identities and...
Instructional Video3:22
Brian McLogan

Solve equations using the double angle formula

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video1:35
Brian McLogan

Evaluate the double angle of sine given a triangle

12th - Higher Ed
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Instructional Video7:45
Brian McLogan

Pre-Calculus - Using Double Angle Formulas to Help Solve for Solutions to an Equation

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video6:12
Brian McLogan

Pre-Calculus - How to Solve an Equation Using Double Angles

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video5:03
Brian McLogan

Learn how to solve a trigonometric equation using double angle formula

12th - Higher Ed
👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can help solve by inverse operations or factoring. We...
Instructional Video8:25
Brian McLogan

Master Writing an expression as one single angle using double angle formulas

12th - Higher Ed
Master Writing an expression as one single angle using double angle formulas
Instructional Video1:45
Brian McLogan

Write an expression as a single trig function of an angle using sum and difference form

12th - Higher Ed
👉 Learn how to write a given sum or difference of two angles formula expression as a single sum/difference of angles trigonometric function. To do this, we first identify the trigonometric function for which its sum/difference formula is...