Find the trigonometric values of various angles that (while they are not special angles) can be expressed as the sum or difference of special angles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Concepts

trigonometric identities

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Additional Tags

khan academy, oh.math.hsf.tf.9, addition formula in trigonometry, fundamental identities

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Classroom Considerations

• Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
• The intended use for this resource is Practice

Common Core

HSF-TF.C.8 HSF-TF.C.9