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Question Details	Asked By	Asked On
Trig Identity	dixie43	12/03/06
can someone please prove this identity. sin^2x - cos^2x - tan^2x = (2sine^2x - 2sine^4x - 1) / 1 - sin^2x

Summary of Answers Received	Answered On	Answered By	Average Rating
1. duplicate question...	12/03/06	raridon

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