Question 1107637
please help me to prove this. Thank you. 
(cos(1/2 x)+sin(1/2 x))/(cos (1/2 x)-(sin(1/2 x))=secx+tanx
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{{{(cos(x)+sin(x))/(cos(x)-sin(x)) = sec(2x) + tan(2x) = (1 + sin(2x))/cos(2x)}}}