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g(x)=intx^(pi/4) f'(t)*sec t + sect*tant...

`g(x)=int_x^(pi/4) f'(t)*sec t + sect*tant*f(t) dt`. Also `f(pi/4)=sqrt2 , f(pi/2)=0 , f'(pi/2)=1` then find the value of `lim_(x to (pi/2)^-)g(x)=?`

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