(tan x+1)/(tan x-1)=....a. (1-sin x cos x)/(1-sin x cos x)

(tan x+1)/(tan x-1)=....a. (1-sin x cos x)/(1-sin x cos x) d. (cosec x+sec x)/(cosec x-sec x) b. (1+sin x cos x)/(1-sin x cos x) e. (cosec x+sec x)/(sec x-cosec x) c. (1-sin x cos x)/(1+sin x cos x)