Question 1 Flag question Marked out of 1. Not complete Calculate the following integrals using the given substitutions: (a) sin( )de subst. u=. ( b ) V/25 - x dr subst. x = Su. Hint: At the end of part b) you may apply the formula VI-ydr= *VI -x2 + arcsin(x) 2 + constant (a) sin ( x ) dx = (b ) V25 - x 2 dx = Check Question 2 Flag question Marked out of 1.00 Not complete Using a suitable substitution, calculate the integral x 2 + 4 x+5 : dx Note: arctan should be typed as atan, e.g. atan(1). 1 0 12 +4x+5 - dx = Check