document.write( "Question 1206661: Write the following vector in standard form. -4,-390° \n" ); document.write( "
Algebra.Com's Answer #844218 by Edwin McCravy(20065)\"\" \"About 
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document.write( "Draw the vector. Remember that negative angles are measured rotating\r\n" );
document.write( "CLOCKWISE from the right side of the x-axis. And the length, or magnitude\r\n" );
document.write( "of the vector is 4. \r\n" );
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document.write( "Draw a perpendicular from the tip of the vector to the x-axis:\r\n" );
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document.write( "\"matrix%281%2C3%2Cx=r%2Acos%28theta%29%2C+%22%2C%22%2Cy=r%2Asin%28theta%29%29\"\r\n" );
document.write( "\"matrix%281%2C3%2Cx=4%2Acos%28-390%5Eo%29%2C+%22%2C%22%2C+y=4%2Asin%28-390%5Eo%29%29\"\r\n" );
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document.write( "To get an equivalent positive angle add 360 twice, or 720 to the angle,\r\n" );
document.write( "getting -390+360+360 = 330 and the reference angle is 30\r\n" );
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document.write( "\"matrix%281%2C3%2Cx=4%2Acos%28330%5Eo%29%2C+%22%2C%22%2C+y=4%2Asin%28330%5Eo%29%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2Cx=4%2A%28sqrt%283%29%2F2%29%2C+%22%2C%22%2C+y=4%2A%28-1%2F2%29%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2Cx=2sqrt%283%29%2C+%22%2C%22%2C+y=-2%29\"\r\n" );
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document.write( "The horizontal-component is the x-value, a multiple of the unit vector i.\r\n" );
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document.write( "The vertical-component is the y-value, a multiple of the unit vector j.\r\n" );
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document.write( "Answer: \"2sqrt%283%29%2Ai%2B-2%2Aj\"\r\n" );
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document.write( "Edwin

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