document.write( "Question 1058523: What is $\"+cos%28t%29+\"$ if $\"+t+\"$ corresponds to the point (-2, 0)? \r
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\n" ); document.write( "D.) Undefined. \n" ); document.write( "

Algebra.Com's Answer #673641 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The angle indicated by the red arc is 180° or p radians.\r\n" );
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document.write( "But the right triangle is \"smashed\" flat against the x-axis,\r\n" );
document.write( "so its hypotenuse coincides with its horizontal side, and\r\n" );
document.write( "its vertical side is 0. \r\n" );
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document.write( "The adjacent side is the x coordinate of the point -2.\r\n" );
document.write( "The hypotenuse r, is the radius vector which coincides \r\n" );
document.write( "with the green line.  Since hypotenuse or radius vector\r\n" );
document.write( "is always taken positive, its value is +2\r\n" );
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document.write( "Edwin

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