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Activity
Math words.com: Trig Identities Activity
Math Words

Math words.com: Trig Identities

For Students 9th - 10th Standards
This MathWords.com site lists the equations for all of the trigonometric identities.
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Unit Plan
Ck 12: Trigonometry: Double Angle Identities Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Double Angle Identities

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Derivation of double angle identities for sine, cosine, and tangent.
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