Brian McLogan
Where do the basic trigonometric identities come from
👉 Learn all about the different trigonometric identities and how they can be used to evaluate, verify, simplify and solve trigonometric equations. The identities discussed in this playlist will involve the quotient, reciprocal,...
Let's Tute
Trigonometric Identities
This video tells us how trigonometric identities help us to simplify the huge expressions involving trigonometric ratios.
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 �Trig 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.
Educator.com
Trigonometric Integrals
Present examples of trigonometric integrals with a video that shows an example of determining a trigonometric integral. The AP Calculus example shows that many of the trigonometric integrals require manipulation and using trigonometric...
Calculus Expert
Hyperbolic Identities
Step into the mathematical hyperbolic chamber! Use a video to show a proof of a hyperbolic equation using hyperbolic identities. Learners see the application of identities and practice simplification.
Curated OER
What is the Secant Ratio?
Using the right triangle ratio definition of cosine, this video defines the secant ratio.
Curated OER
Adjacent Right Triangle Problems
The instructor identifies the terms used to solve for the angle of adjacent right triangles. He does not have an example to solve a problem.
Khan Academy
Khan Academy: Trigonometry: Fun Trig Problem
Video shows solving an equation with sine and cosine by using a trigonometric identity and solving the resulting quadratic equation. [10:01]
Khan Academy
Khan Academy: Trigonometry: Trig Identities Part 3
Video expands upon trigonometric identities derived in previous videos. Identities in this lesson include sine and cosine of the opposite of an angle, sine of an angle plus pi divided by two, and the sine of the difference of two angles....
Khan Academy
Khan Academy: Trigonometry: Trigonometric Identities
Video showing how to derive two basic trigonometric identities. Includes link to additional practice problems. [9:10]
Khan Academy
Khan Academy: Trigonometry: Proof: Cos(a+b)=(cos A)(cos B) (Sin A)(sin B)
Video demonstrating the proof for the formula for the cosine of the sum of two angles. Includes link to additional practice problems. [9:22]
Khan Academy
Khan Academy: Trigonometry: Proof: Sin(a+b)=(cos A)(sin B) + (Sin A)(cos B)
Video demonstrating the proof for the formula for the sine of the sum of two angles. Includes link to additional practice problems. [9:48]
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]
Khan Academy
Khan Academy: Trigonometry: Iit Jee Trigonometric Constraints
Video shows solving a trigonometry problem to find the number of values in a given range that satisfy certain conditions. Trigonometric identities are used. [12:49]
Khan Academy
Khan Academy: Trigonometry: Iit Jee Trigonometry Problem 1
Video demonstrates simplifying a trigonometric expression relating unknown sides and angles of a triangle by using trigonometric identities. [15:13]
Khan Academy
Khan Academy: Trigonometry: Iit Jee Trigonometric Maximum
Video demonstrates finding the maximum of a trigonometric expression that is simplified by using trigonometric identities. [9:54]
Khan Academy
Khan Academy: Trigonometry: 2003 Aime Ii Problem 14
Video demonstrates solving a trigonometric problem that includes finding the area of a convex equilateral hexagon in the coordinate plane using trigonometric identities and the Pythagorean Theorem. [18:18]
Math TV
Math tv.com: Trigonometry: Identities and Formulas
The video proves trigonometric identities. The learning resource consists of a video tutorial with detailed examples and a worksheet with practice problems. Find Identities and Formulas under Trigonometry in the left hand menu.
Math TV
Math tv.com: Trigonometric Functions: More on Identities
Students learn about the six trigonometric identities. The learning resource consists of a video tutorial and a worksheet with practice problems. In the left hand menu, click Trigonometry, Trigonometric Functions, More on Identities.
Khan Academy
Khan Academy: Trig Identities: Trigonometric Identities
Video showing how to derive two basic trigonometric identities.
Khan Academy
Khan Academy: Trig Identities: Proof: Cos(a+b) = (Cos A)(cos B) (Sin A)(sin B)
Video demonstrating the proof for the formula for the cosine of the sum of two angles.
Khan Academy
Khan Academy: Trig Identities: Proof: Sin(a+b) = (Cos A)(sin B) + (Sin A)(cos B)
Video demonstrating the proof for the formula for the sine of the sum of two angles.