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September 1, 2014

September 1, 2014

Posted by **Alice** on Saturday, February 21, 2009 at 5:37pm.

work on one side only...so i worked on the right

=(sinx-siny)(sinx+siny) does that equal

sin(x-y)sin(x+y)??? help!

- trig!! -
**drwls**, Saturday, February 21, 2009 at 5:57pmDuplicate post; already answered.

Refer to your previous post.

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