Find value of c where f(x) = sin(x) ex tan(x), c ∈ (0,∞)

• A. Tan-1[-(2+c2)/(1+c2)
• B. Tan-1[-(2-c2)/(1+c2)]
• C. Tan-1[(2+c2)/(1+c2)]
• D. Rolle’s Theorem is not applied, Cannot find the value of c