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May 22, 2015

Homework Help: Math repost - girly93

Posted by Writeacher on Monday, February 9, 2009 at 7:01am.

Posted by girly93 on Monday, February 9, 2009 at 2:55am.

i don't understand the sine and cosine rules.

1/2 ab sinC

and cosA= b2 + c2 - a2


what???

i have asked my teacher but i still don't get it.

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