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document.write( "Solve the system:
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document.write( "Substitute the value of r from the second equation in the first equation:\r\n" );
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document.write( "
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document.write( "
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document.write( "
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document.write( "\r\n" );
document.write( "
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document.write( "
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document.write( "Swap the first two terms:\r\n" );
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document.write( "
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document.write( "Factor the left side:\r\n" );
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document.write( "
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document.write( "
,
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document.write( "
,
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document.write( "
,
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document.write( "All sines are between -1 and +1 so -3/2 is not a possibility,\r\n" );
document.write( "so we ignore the left equation.\r\n" );
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document.write( "
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document.write( "
, if θ is in degrees. \r\n" );
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document.write( "or\r\n" );
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document.write( "
, if θ is in radians. \r\n" );
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document.write( "Substituting in the first given equation:\r\n" );
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "\r\n" );
document.write( "Edwin
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document.write( "