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TS EAMCET · Maths · Indefinite Integration

cotxsin2xdx=

  1. A cotx+C
  2. B -cotx+C
  3. C tanx+C
  4. D -tanx+C
Verified Solution

Answer & Solution

Correct Answer

(B) -cotx+C

Step-by-step Solution

Detailed explanation

I=∫cotxsin2x ⇒I=∫cosxsinx·12sinxcosxdx ⇒I=12∫cosxsinxcosxcosec2xdx ⇒I=12∫cosec2xcotxdx Put cotx=t ⇒-cosec2xdx=dt ⇒I=-12∫dtt=-t+C⇒I=-cotx+C