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February 1, 2015

February 1, 2015

Posted by **Purplechick4** on Tuesday, February 7, 2012 at 12:03am.

- Pre-Calc/Math -
**Henry**, Wednesday, February 8, 2012 at 3:35pm(0,0),(9,-7).

x = 0, Y = -7.

r^2 = X^2 + Y^2,

r^2 = 0 + (-7)^2 = 49,

r = 7.

secA = r/X = 7/0 = Infinite.

cotA = X/Y = 0 / -7 = 0.

sinA = Y/r = -7 / 7 = -1.

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