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April 19, 2015

April 19, 2015

Posted by **Mike** on Wednesday, May 26, 2010 at 9:40pm.

- trig -
**Reiny**, Wednesday, May 26, 2010 at 9:51pmrecall that

sinPcosQ - cosPsinQ = sin(P-Q)

LS = sin(A+B+C+)cos(B+C)-cos(A+B+C)sin(B+C)

= sin((A+B+C) -(B+C))

= sinA

= RS

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