Double Angle Identities

Double Angle Identities

Open Ended

Use the Sum identity of sin to derive the double angle formula for  $\sin\left(2\alpha\right)$  

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Open Ended

Use the sum identity of cos to derive the double angle formula for  $\cos\left(2\alpha\right)$  

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Open Ended

Use the sum identity for tan to derive the double angle formula for  $\tan\left(2\alpha\right)$  

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• Yes

• No

Examples

• see Jamboard