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AP EAMCET · Maths · Indefinite Integration

cos3x+cos5xsin2x+sin4xdx=

  1. A sinx-6tan-1(sinx)+c
  2. B sinx-2(sinx)-1+c
  3. C sinx-2(sinx)-1-6tan-1(sinx)+c
  4. D sinx-2(sinx)-1+5tan-1(sinx)+c
Verified Solution

Answer & Solution

Correct Answer

(C) sinx-2(sinx)-1-6tan-1(sinx)+c

Step-by-step Solution

Detailed explanation

Let, I=∫cos3x+cos5xsin2x+sin4xdx =∫cos3x1+cos2xsin2x1+sin2xdx =∫cos2x1+cos2xsin2x1+sin2xcosxdx =∫1-sin2x1+1-sin2xsin2x1+sin2xcosxdx =∫1-sin2x2-sin2xsin2x1+sin2xcosxdx Let sinx=t⇒cosxdx=dt I=∫1-t22-t2t21+t2dt =∫t4-3t2+2t21+t2dt…