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Grade: 11
        
the first derivative of a function (sin2x cos2x cos3x+log22x+3) with respect to x at x= π is
  1. 0
  2. 1
  3. -1
  4. does not exist 
24 days ago

Answers : (1)

Aditya Gupta
1236 Points
							
obviously log22x+3= x+3
now let f(x)= sin2x cos2x cos3x+log22x+3sin2x cos2x cos3x+x+3
then f’(x)= 2cos2xcos2x cos3x+sin2x*g’(x)+1, where g(x)= cos2x cos3x
now f’(pi)=  2cos2picos2picos3pi+sin2pi*g’(pi)+1
= – 2 + 0 + 1
=  – 1
kindly approve :)
23 days ago
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