Brian McLogan
How to Use the Double Angle Formula to Solve for the Values of X
π 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...
Brian McLogan
Learn how to solve equation using double angle formula
π 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...
Brian McLogan
Finding the exact value for sine of 15 degrees using the half angle formula
π 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...
Brian McLogan
How to find the exact value using the half angle formula for cosine
π 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...
Brian McLogan
Solve equations using the double angle formula
π 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...
Brian McLogan
Pre-Calculus - How to Solve an Equation Using Double Angles
π 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...
Brian McLogan
Learn how to solve a trigonometric equation using double angle formula
π 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...
Brian McLogan
Master Writing an expression as one single angle using double angle formulas
Master Writing an expression as one single angle using double angle formulas
Brian McLogan
How to verify an identity using double angle formulas
π 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)...
Brian McLogan
Solve Trigonometric Equation Double Angle Formula
Solve Trigonometric Equation Double Angle Formula
Brian McLogan
Master Verifying an identity using the double angle formulas
Master Verifying an identity using the double angle formulas
Brian McLogan
Master Evaluating the double angle for Sine, Cosine and Tangent given an equation and constraint
Master Evaluating the double angle for Sine, Cosine and Tangent given an equation and constraint
Brian McLogan
Master Evaluating the double angle for Sine, Cosine and Tagent, given an equation and constraint
Master Evaluating the double angle for Sine, Cosine and Tagent, given an equation and constraint
Brian McLogan
Exam Review Find the general solution with multi angles
π 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)...
Brian McLogan
Master Evaluating using the half angle formulas given an equation and constraint
Master Evaluating using the half angle formulas given an equation and constraint
Brian McLogan
Master Solving a trigonometric equation using double angle formulas
Master Solving a trigonometric equation using double angle formulas
Professor Dave Explains
Formulas for Trigonometric Functions: Sum/Difference, Double/Half-Angle, Prod-to-Sum/Sum-to-Prod
An overview of various formulas relating to trigonometric functions.
Khan Academy
Trig Identities Part 3 (Part 5 If You Watch the Proofs), Trigonometry
Sal takes the mystery out of the trigonometric identities by showing how easily they can be derived. He continues with a problem he started in the video οΏ½Trig Identities part three (part five if you watch the proofs) and proves the trig...
Khan Academy
Trig Identities Part 2 (Part 4 If You Watch the Proofs)
In this video, Sal reviews the basic trigonometric definitions and identities, including the sum of angle formulas, and then derives the double angle formulas.
Khan Academy
Khan Academy: Trigonometry: Trig Identities Part 2
Video deriving the double angle formulas for sine and cosine as well as the start of finding the cosine of the opposite of an angle. Reviews basic trigonometric ratio definitions and some basic trigonometric identities. [9:57]
Khan Academy
Khan Academy: Trigonometry: Trigonometry Identity Review/fun
Video showing how to derive additional trigonometric identities, including the double angle formulas, from the sine and cosine of the sum and difference of two angles. Includes link to additional practice problems. [11:07]