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T R

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  • Limits using Trig Identities

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    I was wondering why, 1−2sin^2(θ) can be factored using the difference of squares to equal,(1+2 squared ​sin(θ))​(1−2​ squared sin(θ)?  If I foil, how does (2 squared sin)(2 squared sin) =2sin^2​

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