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