Math Chapter Wise Limit, Continuity And Differentiability Of Function Of One Variable English MCQ UP PCS (Pre) 2009 Q.If u = emx (y–z) y = m sin x, z = cos x then du dx is Aemx (m3 +1) cos x Bemx/(m+1) cos x Cemx/(m+1) sin x Demx (m2 +1) sin x Show answer Correct answer: emx (m2 +1) sin x