Sunday

September 21, 2014

September 21, 2014

Posted by **Anonymous** on Tuesday, November 2, 2010 at 10:56pm.

- pre cal -
**Reiny**, Tuesday, November 2, 2010 at 11:49pmlet sin^-1 (3/5) = Ø

then sinØ = 3/5 and cosØ = 4/5

so you want tan 2Ø

= sin2Ø/cos2Ø

= 2sinØcosØ/(2cos^2Ø - 1)

= 2(3/5)(4/5)/(32/25 - 1)

=(24/25) / (7/25)

= (24/25)(25/7)

= 24/7

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