sin( 2.x) 1. In order to find dx , which of the following substitutions would be the most efficient choice. sin - (x) + 1) A. u = (sin- (x)+ 1)3 B. u = sin-x + 1 C. u = sin(x) D . u = sin (2x) 2. The acceleration of a moving object is given by the formula a(t) = est + 3t- and v(0) = NIH Which of the following is the correct function for the velocity. A. v(t) = 2e2t + +3 + NI W B. v(t) = =e2t + +3 + C. v(t) = =e2t + +3 D. v(t) = ze2t + +3 NIH 3. The indefinite integral ( (sin ? x cos x)dx is equal to:- A. - sin 'x+ sin x - sin 'x + C - B. W / - sin x UIIN sin x + - sin x + C C. - sIn UIIN sin 5 X - sin x + C' D. sin 'x - sin x + sin x + C