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let x belongs to ( 0,∏/4 ) and a = (tanx) tanx ,b=(tanx) cotx c= (cotx) tanx and d= (cotx) cotx then, d>c b c>a b (multiple choice ques) Plz explain me how to do questions like this....

let x belongs to (0,∏/4) and a = (tanx)tanx ,b=(tanx)cotx 


c= (cotx)tanx and d= (cotx)cotx then,



  1. d>c

  2. b

  3. c>a

  4. b


(multiple choice ques)


Plz explain me how to do questions like this....

Grade:12

1 Answers

Aman Bansal
592 Points
9 years ago

Dear Abhijat,

According to the given question,

Since  0<x<pi/4 

Therefore  0<tanx<1

Using the proberty tanx = 1/cotx,

we can write a relation between a,b ,c and d,

The correct answer is 1 and 3

Best Of luck

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