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** have Sin * * * * ) * *** * Cos B - Cos A *** **
** *** ** * *** ( ** * ** * * *** 45 X *** ** * Cos ** * *** 30 *
******* * X ****** * ******** * *** * √3/ ****** * * 1/ (2√2 ** =(√3
* 1 * * *****