document.write( "Question 1094866: could you please help me find sin(2x) and cos(2x)\r
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document.write( "sinx= 3/√10 and pi/2 < x < pi\r
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document.write( "the answers that I was getting were very wrong \n" );
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Algebra.Com's Answer #709458 by rothauserc(4718) You can put this solution on YOUR website! the inverse sin of 3/square root(10) = 71.5651 \n" ); document.write( ": \n" ); document.write( "x = 180 - 71.5651 = 108.4349 \n" ); document.write( ": \n" ); document.write( "sin(2x) = sin(2 * 108.4349) = -0.6 \n" ); document.write( ": \n" ); document.write( "cos(2x) = cos(2 * 108.4349) = -0.8 \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( " |