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If 1-cosx-xsinxx2+1-2xsinxdx=tan-1(f(x))+c, then f(n) is

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Important Questions on Indefinite Integration

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If 19-16x2dx=αsin-1(βx)+c, then α+1β=
HARD
If tanx1+tanx+tan2xdx=x-KAtan-1Ktanx+1A+C, (C is a constant of integration), then the ordered pair K,A is equal to
HARD
The integral sin2xcos2xsin5x+cos3xsin2x+sin3xcos2x+cos5x2dx, is equal to

(where C is the constant of integration).
HARD
If fx=5x8+7x6x2+1+2x72dx, x0, and f0=0, then the value of f(1) is
HARD
If m is a non-zero number and x5m-1+2x4m-1x2m+xm+13dx=fx+c, then fx is equal to
HARD
If x-5x-7dx=Ax2-12x+35+logx-6+x2-12x+35+C then A=
HARD
If dxx31+x623 =xfx1+x613+C, where C is a constant of integration, then the function fx is equal to
HARD
If logt+1+t21+t2dt=12gt2+c, where c is a constant, then g2, is equal to
MEDIUM
The integral dxx+134x-254, is equal to
HARD
Let, n2 be a natural number and 0<θ<π2. Then sinnθ-sinθ1ncosθsinn+1θdθ, is equal to
HARD
The integral 2x12+5x9x5+x3+13dx, is equal to
MEDIUM
The integral 1+2cotxcosecx+cotxdx, 0<x<π2 is equal to
HARD
If dxcos3x 2sin2x=tanxA+CtanxB+k, where k is a constant of integration, then A+B+C equals 
MEDIUM
The integral 2x3-1x4+xdx, is equal to
MEDIUM
Let, In=tannxdxn>1 . If I4+I6=atan5x+bx5+c, then the ordered pair a,b, is equal to
HARD
The integral 3x13+2x112x4+3x2+14dx, is equal to