document.write( "Question 432307: sin[arccos1/2 + arcsin(-1)] \n" ); document.write( "
Algebra.Com's Answer #300028 by lwsshak3(11628)\"\" \"About 
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sin[arccos1/2 + arcsin(-1)]
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\n" ); document.write( "Using addition formula for sin: sin(x+y)=sinxcosy+cosxsiny
\n" ); document.write( "sin[arccos1/2 + arcsin(-1)]
\n" ); document.write( "sin(60+270)=sin60cos270+cos60sin270
\n" ); document.write( " =sqrt(3)/2)(0)+1/2(-1)
\n" ); document.write( " =0-1/2=-1/2
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