Posted by Katie on Saturday, March 3, 2012 at 5:37pm.
sin/(cos+1) + (cos-1)/sin
= [sin*sin + (cos-1)(cos+1)]/[sin(cos+1)]
= (sin^2 + cos^2 - 1)/[sin(cos+1)]
= (1-1)/[sin(cos+1)]
= 0
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