please help i can't figure it out!

as well as

(2 tan 4θ)/(1 − tan2 4θ)

please help i can't figure it out!

as well as

(2 tan 4θ)/(1 − tan2 4θ)

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Woodland Hills, CA

2 tan 4Θ/ ( 1 - tan ^{2} 4 Θ ) = Tan 8θ

This is formula for Tan twice the angle

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