Instructional Video

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

Curated by ACT

Video demonstrating the proof for the formula for the sine of the sum of two angles. Includes link to additional practice problems. [9:48]

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CCSS: Adaptable
Concepts
trigonometric identities
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Additional Tags
sine formula, sine of the sum of 2 angles, sine of the sum of two angles, trig identities, khan academy, khan academy math, addition formulas
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Classroom Considerations
  • This video is hosted on YouTube
Common Core
HSF-TF.C.9 HSF-TF.C.8