Integral 1/4 x sin (5x-6)dx

integral parsial

∫ ¹/₄ x  sin (5x-6) dx

def...........int
¹/₄x.........sin (5x-6)
¹/₄ .......-¹/₅ cos (5x -6)
0 ...... -¹/₂₅  sin(5x-6)

= ¹/₄  x (-¹/₅)  cos(5x-6) -(¹/₄)(-¹/₂₅) sin(5x-6)
= -¹/₂₀ cos (5x -6) + ¹/₁₀₀ sin (5x-6)
= -¹/₁₀₀ ( 5 cos (5x-6) - sin (5x-6))