Posted by **George** on Thursday, April 10, 2008 at 9:22pm.

1. (sec^2x-6tanx+7/sec^2x-5)=(tanx-4/tanx+2)

2. (sin^3A+cos^3A/sinA+cosA)=1-sinAcosA

3. csc^6x-cot^6x+1+3csc^2xcot^2x

please help

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