document.write( "Question 1177648: (0, −9)
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Algebra.Com's Answer #806763 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Hi\r\n" );
document.write( "(0, −9) 3rd quadrant\r\n" );
document.write( " r = sqrt(x^2 + y^2) = sqrt(81) = ± 9\r\n" );
document.write( "for the point for 0 ≤ 𝜃 < 2𝜋\r\n" );
document.write( "tan θ = 0/-9 = 0  Look below:  θ is 3π/2  0r    3π/2 - π = π/2 if r < 0\r\n" );
document.write( "two sets of polar coordinates:\r\n" );
document.write( "(9, 3π/2)  and (-9, π/2) \r\n" );
document.write( "Wish You the Best in your Studies\r\n" );
document.write( "(cos, sin)  Unit Circle:\r\n" );
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