document.write( "Question 1080588: What type of directrix does this conic have? r = 4/-2-cosθ or https://s10.postimg.org/kbq3bkdpl/r_-2_-cos.png
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Algebra.Com's Answer #694744 by ikleyn(52909) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Dear tutor MathLover1 !\r\n" );
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document.write( "Do you agree that the radius \"r\" in polar coordinates is always positive and can not be negative ?\r\n" );
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document.write( "If you do agree, then how the formula r =  can produce the positive r ?\r\n" );
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