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Using and Proving Trigonometric Identities

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More Lessons for Algebra II Math

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Videos, solutions, worksheets, games and activities to help Algebra 2 students learn how to use and prove trigonometric identities.

Proof of the trig identity sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
Proof of the trig identity: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)

Revisiting the proofs of some trigonometry identities.
Proving some Random Trigonometric Identities - 3 examples are shown

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