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Please help me with this answer...very urgently required

Please help me with this answer...very urgently required

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Grade:9

1 Answers

Arun
25758 Points
3 years ago
 
Dear student
 
use property of (a+ b – x) and add
 
you get
 
2I = integration from -pi to pi (cos^2x(a^x+ 1) / (a^x+ 1)) dx
 
2I = integrationfrom -pi to pi  of (cos^2x) dx
 
as cos^2 x is even function
 
I = integrationfrom 0 to pi ( 1 + cos 2x)/2 dx
 
I = [x/2 + sin2x/4]0pi
 
I = pi/2 + 1
 
 

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