Posted by Anonymous on Friday, November 8, 2013 at 8:20pm.
left side (1/cos) /(1/cos -sin/cos) 1/(1 - sin) right side 1/cos^2 + sin/cos^2 (1+sin)/(1-sin^2) (1+sin) / [(1+sin)(1-sin) ] 1/(1-sin) remarkable :)