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document.write( "the \"angle 1\" means 1 radian, which is about 57.3°, so 1 radian is in quadrant QI,\r\n" );
document.write( "so cos(q) is positive. \r\n" );
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document.write( "From p to 2p is the region below the x-axis, which includes quadrants QIII and\r\n" );
document.write( "QIV. Of those two quadrants, the cosine is positive only in QIV.\r\n" );
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document.write( "The angle q in QIV which has 1 radian as its reference angle is found by\r\n" );
document.write( "subtracting 1 radian from 2p (which is the same as 360°).\r\n" );
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document.write( "Answer: 2p - 1\r\n" );
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document.write( "Edwin
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