Integration of 1 / (5+4sinx) dx ,upperlimit pi/2 lower limit 0 t
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Put sinx= (2 tan(x/2)) / 1+tan^2 (x/2)
And solve
Then put tan(x/2) =t
Therefore sec^2(x/2) dx= 2dt
Then integrate the quadratic in denominator.
And solve
Then put tan(x/2) =t
Therefore sec^2(x/2) dx= 2dt
Then integrate the quadratic in denominator.
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