document.write( "Question 1158448: Find the cosine (cos) of the angle in standard position determined by the point (-7, -3) \n" ); document.write( "

Algebra.Com's Answer #781401 by ikleyn(52879) $\"\"$ $\"About$

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document.write( "The point is in QIII, where cosine is NEGATIVE.\r\n" );
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document.write( "cos(a) is the ratio of the adjacent leg (which is -7 in this case) to the hypotenuse length;\r\n" );
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document.write( "    the sign of the ratio should be selected as a \" - \" (minus).\r\n" );
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document.write( "The hypotenuse length is   =  = .\r\n" );
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document.write( "Hence, the answer is  cos(a) = - .\r\n" );
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