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how to solve this question without dividing by cos^4x in numerator and denominator.some other method to solve this ques

how to solve this question without dividing by cos^4x in numerator and denominator.some other method to solve this ques
 

Question Image
Grade:12

1 Answers

Vikas TU
14149 Points
one year ago
Dear student 
There is no other way , you have to divide it by  cos^4x in numerator and denominator , If not then expansion of 4th power term will be very difficult to handle. 
Hope this helps 
Good luck 

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