1) If ∫f(x)log(sinx)dx=log[logsinx]+c , then f(x) is equal to A) cot x B) tan x C) sec x D) cosec x Answer: Option AExplanation:Given, ∫f(x)log(sinx)dx=log[logsinx]+c On differentiating both sides , we get f(x)log(sinx)=1logsinxddx(logsinx)+0 ⇒ f(x)log(sinx)=1logsinx×1sinx×cosx ⇒ f(x) = cot x