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The function f(x) = {x+asqrt2 sinx, 0<=...

The function `f(x) = {x+asqrt2 sinx, 0<=x<=pi/4 and 2x cotx+b, pi/4<=x<=pi/2 and a cos 2x-bsinx, pi/2,x<=pi` is continuous for `0<= x <=pi` ,then value of `a,b` are

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