Instructional Video3:27
Brian McLogan

Make sure you pick the right identity to help you verify

12th - Higher Ed
In this video I will help you determine how to choose the right identity when you are verifying identities. It may seem obvious but often it is not.



⭐️ A secret weapon most students overlook to verify an identity -...
Instructional Video2:09
Brian McLogan

Simplifying a trigonometric expression using half angle formula

12th - Higher Ed
👉 Learn how to write the trigonometric function given the expression. We will focus on the expression for the half-angle of sine, cosine and tangent. When given the expression we will need to determine which function's identity is equal...
Instructional Video4:38
Brian McLogan

How to determine the half angle of tangent when given a triangle

12th - Higher Ed
👉 Learn how to evaluate the tangent of a half-angle. When given the value of the tangent of an angle, we can evaluate the tangent of half the angle using the tangent half-angle formula. When the value of any other trigonometric function...
Instructional Video4:52
Brian McLogan

How to use the half angle formula for tangent tan75

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 Video5:23
Brian McLogan

Using the half angle of sine to evaluate an angle

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 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 Video2:50
Brian McLogan

Evaluate 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 Video3:28
Brian McLogan

How to use the half angle formula for tangent to evaluate for an angle

12th - Higher Ed
👉 Learn how to evaluate the tangent of a half-angle. When given the value of the tangent of an angle, we can evaluate the tangent of half the angle using the tangent half-angle formula. When the value of any other trigonometric function...
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 Video3:02
Brian McLogan

Using the the half angle formula for sine to evaluate

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 Video1:09
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 Video4:39
Brian McLogan

How to use the half angle of cosine when given a triangle

12th - Higher Ed
👉 Learn how to evaluate the tangent of a half-angle. When given the value of the tangent of an angle, we can evaluate the tangent of half the angle using the tangent half-angle formula. When the value of any other trigonometric function...
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 Video3:47
Brian McLogan

Given Sine, evaluate the half angle of cosine

12th - Higher Ed
👉 Learn how to evaluate the tangent of a half-angle. When given the value of the tangent of an angle, we can evaluate the tangent of half the angle using the tangent half-angle formula. When the value of any other trigonometric function...
Instructional Video2:09
Brian McLogan

Half angle of tangent given an angle

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 Video8:45
Brian McLogan

Using half angles to solve trigonometric equations

12th - Higher Ed
👉 Learn how to solve equations using half-angle identities. To do this we will replace every trig function with half angles using the identity. Then we will simplify and solve trigonometric functions. To find the values we will use the...
Instructional Video2:53
Brian McLogan

Evaluate the half angle of tangent for 105 degrees

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 Video6:36
Brian McLogan

Determining the triple angle of cosine to solve the equation

12th - Higher Ed
👉 Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric equations, they include by factoring out the GCF and simplifying the factored equation. Another method is to use a...
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 Video5:08
Brian McLogan

Learn how to evaluate the half angle for sine in radians

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 Video2:05
Brian McLogan

Learn how to evaluate the angle in radians 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 Video4:35
Brian McLogan

Subtracting two rational trig expression to simplify

12th - Higher Ed
👉 Learn how to simplify rational identities involving addition and subtraction. To simplify rational identities involving addition and subtraction, first, we find the LCM of the denominators which most time is the product of the terms in...
Instructional Video6:02
Brian McLogan

Pre-Calculus - How to find the exact value by using the sum of two angles formula with cosine

12th - Higher Ed
👉 Learn how to evaluate the cosine of an angle in radians using the sum/difference formulas. To do this, we first express the given angle as a sum or a difference of two (easy to evaluate) angles, then we use the unit circle and the...
Instructional Video2:19
Brian McLogan

Half angle formula 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...