document.write( "Question 1149958: how do i verify the identity of sin(x+pi/2)=cos x
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Algebra.Com's Answer #771286 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Use the formula \"sin%28A%2BB%29=sin%28A%29cos%28B%29%2Bcos%28A%29sin%28B%29\"\r\n" );
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document.write( "on the left side:\r\n" );
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document.write( "\"sin%28x%2Bpi%2F2%29=cos%28x%29\"\r\n" );
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document.write( "\"sin%28x%29cos%28pi%2F2%29%2Bcos%28x%29sin%28pi%2F2%29\"\r\n" );
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document.write( "\"sin%28x%29%280%29%2Bcos%28x%29%281%29\"\r\n" );
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document.write( "\"cos%28x%29\"\r\n" );
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document.write( "Edwin
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