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Grade:
        
The value of
π/2
  ∫   ((cos 3x+1)/(2 cos x -1)) dx, is
 0
A) 2
B) 1
C) 1/2
D) 0
one year ago

Answers : (1)

Aditya Gupta
1717 Points
							
cos3x= 4c^3-3c, where c is cosx
So we have to integrate
(4c^3-3c+1)/(2c-1)= 2c^2+c-1= cosx+cos2x
We can easily integrate this from 0 to pi/2 to obtain the final answer as 1.
one year ago
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