larkistheonlyofficialversionofthetest.AnytyposonthePDF willnotbefixed.BesuretocheckCrowdmarkforliveversionofthetest. Q1. 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(x) = 2 sin (7), which matched the official solution, and Abishek got F(x) = - 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) 2sin (x) cos(x) cos (2x) = cos2 (x) - sin2(x) 1 = cos2 (x) + sin2(x)