document.write( "Question 1083591: Sin (90-A) Sin A -cos (90-A) Cos A
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Algebra.Com's Answer #697594 by ikleyn(52835)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "= -cos((90-A) +A) = -cos(90) = 0.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |