Saturday

February 28, 2015

February 28, 2015

Posted by **Jenn** on Saturday, April 7, 2012 at 3:20pm.

- Trig -
**Bosnian**, Saturday, April 7, 2012 at 3:33pm( a - b ) ( a + b ) = a ^ 2 - b ^ 2

( 1 - sin è )( 1 + sin è ) =

1 ^ 2 - sin ^ 2 è =

1 - sin ^ 2 è =

cos ^ 2 è

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