Finish your homework easily and quickly with Expert Help and FREE NCERT Solutions
Introductory Video
Select Board
Select Class
By clicking on "SIGN UP" you agree to T&C
Existing user? Login here
Purchase mobileappIcon Download our Mobile App
Call Us at 011-40705070  or  
Click to Call
Select your Board & Class
  • Select Board
  • Select Class
 help plz !!!integration of sec x log(sec x + tan x) dx 
Asked by Rima Bareh(student) , on 13/9/12

Become Expert
Become a Math expert
Start Now with Video Lessons, Sample Papers, Revision Notes & more for Class-XII-Science - CBSE 

BEST ANSWER Certified by MeritNation Expert  

Ans : I =  ⌡ secx*log(secx+tanx) dx

Let u=log(secx+tanx)

Differentiate wrt  "x"

du/dx = {1/(secx+tanx)} * { d(secx)/dx + d(tanx)/dx}

du/dx = {1/(secx+tanx)} * { (secx*tanx)+(sec2x)}

du/dx = {1/(secx+tanx)} * { (tanx)+(secx)} * secx

du = secx dx

Therefore: I = ⌡u du

I = (u2/2) + C

I = ( [ log(secx+tanx)]  2/2) + C

If you are satified do give thumbs up.

Posted by Mohd Imad(student)on 13/9/12

This conversation is already closed by Expert

Ask a QuestionHave a doubt? Ask our expert and get quick answers.
Show me more questions