document.write( "Question 197567: find the cosine of the angle formed with the coordinates (-6, 7) located in standard position \n" ); document.write( "

Algebra.Com's Answer #148152 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!
find the cosine of the angle formed with the coordinates (-6, 7) located in standard position
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document.write( "Plot the point (-6,7)\r\n" );
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document.write( "Draw the radius vector, r, from the origin (0,0) to the point (-6,7). \r\n" );
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document.write( "Indicate the angle.  I'll call it .\r\n" );
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document.write( "Draw a vertical line perpendicular down to the x-axis, and\r\n" );
document.write( "label it .\r\n" );
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document.write( "Draw a horizontal line from the origin to the bottom of\r\n" );
document.write( "that line, completing a right triangle.  Label it \r\n" );
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document.write( "Now we find the length of  by the Pythagorean theorem:\r\n" );
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document.write( "So we put  for : \r\n" );
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document.write( "Now since\r\n" );
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document.write( "Edwin

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