4), Please solve the Trigonometric Integral . a ) . (sin " * cosxax b ). Stano secodo 5 ). Kindly use Trigonometric substitution to solve. b). 2 2 a ). dx dx 1x 2-25 x 2 + 1 b) Please use Partial Fraction Expansion to solve S ( x2+ 11x) ( x - 1) ( x+1 ) 2 1). Kindly solve the following Improper Integrals. b ) . 1 (x - 1)2 dx