SAT II math 2c help!!!

[ballin_1]

<p>help?! and would this be on the sat II math 2c test?</p>

<li>If a point has polar coordinates (2, pi), then what are its rectangular coordinates?</li>
</ol>

<p>a. (0,-2)
b. (2,0)
c. (-2,-2)
d. (-2,0)
e. (0,2)</p>

<li>abs (7+i)
a. 5root2
b. 2root2
c. 2root5
d. 3
e. root6</li>
</ol>

<p>thanks!</p>

[stix2400]

<p>For the first one, since pi is 180 degrees, the point is going to be on the x axis and since r=2, it will be (-2,0).</p>

<p>For the second one, abs is actually just (for a+bi) sqt(a^2+b^2) or sqt(50) which is 5sqt2. That's just the definition of abs for imaginaries.</p>