z=1-cosx1+cosx  হলে, ddx  (tan-1z)  = কত?

A       14  
B   12
C 34 
D 1

Correct Answer:   12

Bissoy MCQ

Related Questions

a>1 হলে ddx In ax = ? 
ddx(exsinx)=?
    ddx(tan4x+3)= কত? 
     ddx(sin-1x)=কত?  
    ddx(xlogx)= কত?
      ddx(sin-1x)= কত?  
ddx e7 log xx6 = কত ? 

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