Question

( int propto sin x d x )
( x int sin x-intleft[frac{d}{d x}(x) int sin x d xright] d x )
( -x cos x-int(1)(-cos x) d x )
( -x cos x+int cos x d x )
( -x sin x+c )
( sin alpha=sin x+c )

# 5. If (xsin x dx = -xcos x +a , then the value of a will be: (a) sin x + c (b) cos x + c (c)c (d) None of these.

Solution