Q1 (5 points) When working on Assignment 5, Dilaany and Abishek worked together on Question 2: Use guess and check to find an anti-derivative F(x ) for f(x) = sin(x) cos(x) Dilaany got F(x) = - sin (E), which matched the official solution, and Abishek got F(r) = - -cos(2x). Both of them received full marks. The Question: Explain how this is possible. Are they both correct? You may use the following trigonometric identities sin (2x) = 2 sin(x) cos(x) cos(2x) = cos (x) - sin (x) 1 = cos (x) + sin (x)