Khan Academy: Trigonometry: Proof: Cos(a+b)=(cos A)(cos B) (Sin A)(sin B) Instructional Video

Publisher

Instructional Video

Khan Academy: Trigonometry: Proof: Cos(a+b)=(cos A)(cos B) (Sin A)(sin B)

Curated by ACT

Video demonstrating the proof for the formula for the cosine of the sum of two angles. Includes link to additional practice problems. [9:22]

3 Views 0 Downloads CCSS: Adaptable

Concepts

trigonometric identities

Additional Tags

cosine formula, cosine of the sum of 2 angles, cosine of the sum of two angles, trig identities, khan academy, khan academy math, addition formulas

Classroom Considerations

This video is hosted on YouTube

Common Core

View 38,632 other resources for 9th - 10th Grade Math