Brian McLogan
Congruency statements for Law of Sines and Cosines
👉 Learn how to solve for the length of the sides and the measures of the angles of a triangle using the law of sines. The law of sines is used in determining the length of the opposite side to a known angle measure or the measure of the...
FuseSchool
Sine Rule
Discover how to apply the Law of Sines to find unknown side and angle measures. A detailed video lesson describes the Law of Sines in different forms. The instructor completes two different examples that find both an angle and side...
FuseSchool
Sine or Cosine Rule?
Explore triangle problems that require the Law of Sine or Law of Cosine. A straightforward lesson focuses on deciding when to use each law. The instructor presents several triangles for pupils to consider and describes patterns in the...
Corbett Maths
Cosine Rule – Missing Sides
Not a right triangle, not a problem. Pupils learn about the cosine rule, or the law of cosines, to solve for missing side measures in triangles. They accomplish this task by watching a short video, which covers two examples.
Khan Academy
Khan Academy: Trigonometry: Law of Cosines
This is a video showing how to derive the law of cosines. [9:27]
Khan Academy
Khan Academy: Trigonometry: 2003 Aime Ii Problem 11
Video demonstrates solving a trigonometric problem that includes finding the area of an oblique triangle using the Pythagorean Theorem and the law of cosines [16:35]
Math TV
Math tv.com: Triangles: The Law of Cosines
The video tutorial investigates how to use the law of cosines to solve for different parts of a triangle. A worksheet consisting of practice problems and solutions is included to check for understanding of the concept. In the left hand...
Sophia Learning
Sophia: Solving an Sas Triangle With the Law of Cosines: Lesson 6
Solving an SAS by using the Law of Cosines is demonstrated here. This lesson is 6 of 6 in the series titled "Solving an SAS Triangle with the Law of Cosines."
Khan Academy
Khan Academy: Trig Identities: Law of Cosines
Introduction to the law of cosines to solve for a side of a triangle when 2 sides and an angle are known.
Virtual Nerd
Virtual Nerd: What Is the Law of Cosines?
The Law of Cosines helps solve some triangle problems. This video explains several versions of the law of cosines and what they are used for. [9:22]
PatrickJMT
Patrick Jmt: Law of Cosines, Example 1
Easy to follow video tutorial gives the formula for the Law of Cosines and uses it to find the missing side length of a triangle. [5:05]
Khan Academy
Khan Academy: More Trig Examples: 2003 Aime Ii Problem 11
Video demonstrates solving a trigonometric problem that includes finding the area of an oblique triangle using the Pythagorean Theorem and the law of cosines.
PatrickJMT
Patrick Jmt: The Law of Cosines
This video provides the formula for the 'Law of Cosines' and one 'applied' example is shown. [4:58]
Khan Academy
Khan Academy: Trig Word Problem: Stars
Sal solves a word problem about the distance between stars using the law of cosines.
Khan Academy
Khan Academy: Solving for a Side With the Law of Cosines
Learn how to use the law of cosines to find the missing side length of a triangle when given two side lengths and the contained angle measure.
Khan Academy
Khan Academy: Proof of the Law of Cosines
Sal gives a simple proof of the Law of cosines.
Sophia Learning
Sophia: Finding the Area of an Sas Triangle: Lesson 4
Finding the are of an SAS triangle is demonstrated in this lesson. It is 4 of 7 in the series titled "Finding the Area of an SAS Triangle."
Sophia Learning
Sophia: Finding the Area of an Sas Triangle: Lesson 6
Finding the are of an SAS triangle is demonstrated in this lesson. It is 6 of 7 in the series titled "Finding the Area of an SAS Triangle."
Sophia Learning
Sophia: Finding the Area of an Sas Triangle: Lesson 1
Finding the are of an SAS triangle is demonstrated in this lesson. It is 1 of 7 in the series titled "Finding the Area of an SAS Triangle."
Sophia Learning
Sophia: Solving an Sas Triangle With the Law of Cosines
Solving an SAS by using the Law of Cosines is demonstrated here.
Sophia Learning
Sophia: Solving an Sas Triangle With the Law of Cosines #6
Solving an SAS by using the Law of Cosines is demonstrated here.
Sophia Learning
Sophia: Finding the Area of an Sas Triangle: Lesson 3
Finding the are of an SAS triangle is demonstrated in this lesson. It is 3 of 7 in the series titled "Finding the Area of an SAS Triangle."
Sophia Learning
Sophia: Finding the Area of an Sas Triangle: Lesson 5
Finding the are of an SAS triangle is demonstrated in this lesson. It is 5 of 7 in the series titled "Finding the Area of an SAS Triangle."
Sophia Learning
Sophia: Solving an Sas Triangle With the Law of Cosines: Lesson 3
Solving an SAS by using the Law of Cosines is demonstrated here. This lesson is 3 of 6 in the series titled "Solving an SAS Triangle with the Law of Cosines."