document.write( "Question 720476: if the point (-2,-7) is on the terminal arm of N, an angle in standard position, what is the value of cos N? \n" ); document.write( "

Algebra.Com's Answer #442038 by lwsshak3(11628) $\"\"$ $\"About$

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if the point (-2,-7) is on the terminal arm of N, an angle in standard position, what is the value of cos N?
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\n" ); document.write( "The value of angles in standard positions is measured by their reference angles.
\n" ); document.write( "The reference angle is the angle the terminal arm makes with the horizontal x-axis
\n" ); document.write( "The reference angle is in quadrant III where tan>0
\n" ); document.write( "The x-value(-2) represents the horizontal(cos) leg of the reference right triangle
\n" ); document.write( "The y-value(-7) represents the vertical(sin) leg of the reference right triangle
\n" ); document.write( "The hypotenuse=√(2^2+7^2)=√(4+49)=√53
\n" ); document.write( "cosN=-2/√53≈-0.2747 \n" ); document.write( "

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