We found 999 reviewed resources for Trigonometric Identities
Trigonometric Ratios with a Calculator: Lesson
4 mins 9th - 12th CCSS: Adaptable
Calculators ... they are more efficient than tables. Using two 30-60 right triangles, the segment of a playlist on geometry shows that trigonometric ratios for an angle are the same independent of the size of the triangle. The video...
The Trigonometric Ratios: Lesson
6 mins 9th - 12th CCSS: Adaptable
SOH, what is this thing called trigonometric ratios? A section of an extensive playlist on geometry identifies the adjacent and opposite sides in relationship of an angle. Using the identified sides, the video defines the sine, cosine,...
Trigonometric Ratios: A Geometer's Perspective
9th - 11th CCSS: Adaptable
What do all right triangles have in common? Young mathematicians investigate the trigonometric ratios in relation to right triangles. Their investigations lead to a hypothesis they use to determine unknown lengths in different triangles.
Intro to Trigonometric Ratios
4 mins 9th - 12th CCSS: Adaptable
Finding trigonometric ratios is relatively easy; you just have to know where to look. The first installment of a 16-part video playlist shows how to find the sine, cosine, and tangent values for a given angle. It shows how to find the...
Basic Trigonometric Identities from Graphs
10th - 12th CCSS: Designed
Have young mathematicians create new identities! They explore the even/odd, cofunction, and periodicity identities through an analysis of tables and graph. Next, learners discover the relationships while strengthening their understanding...
Trigonometric Ratios: Sine
6 mins 10th - 12th CCSS: Adaptable
What happens when you don't have enough information to use the Pythagorean Theorem? Time for some trig! The second lesson in a series of four introduces the definition of sine, teaches how to find the sine ratio of a right triangle, and...
Inverse Trigonometric Ratios: Lesson
5 mins 9th - 11th CCSS: Adaptable
Finding the inverse of trigonometric ratios is not the same as finding the reciprocal. The presentation introduces how to find the angle of a right triangle given sides. Part of a larger playlist on geometry, the video uses the inverse...
Applications of Trigonometric Functions
10th - 12th CCSS: Adaptable
Using trigonometric ratios to solve geometry and application problems is the focus of this detailed problem set and solution presentation. The presentation covers many ways to use trigonometry, from finding missing measures in right...
The Definition of Sine, Cosine, and Tangent
9th - 10th CCSS: Designed
Introduce your classes to a new world of mathematics. Pupils learn to call trigonometric ratios by their given names: sine, cosine, and tangent. They find ratios and use known ratios to discover missing sides of similar triangles.
Inverse Trig Functions: Arccos
4 mins 10th - Higher Ed CCSS: Adaptable
In the third video on inverse trigonometric functions, Sal follows a format similar to the last two. He finds the value for the arcos (-1/2) and shows the restricted domain of the arccos function. He also finds the value for cos(arccos...
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