<PRE><B>Question 1178585</B>
Given cot A=9/4 and that angle A is in Quadrant III, find the exact value of the sun A in simplest radical form using a rational denominator
--------------
I&#39;ll assume you meant sin(A):
-----
tan = 1/cot = 4/9
tan = y/x
r = sqrt(x^2 + y^2) = sqrt(97)
sin(A) = y/r = -4/sqrt(97) = {{{-4sqrt(97)/97}}}
Sine is negative in Q3
</PRE>