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Let f(x)={:((1+cosx)/((pi-x)^(2)). (sin^...

Let `f(x)={:((1+cosx)/((pi-x)^(2)). (sin^(2)x)/(log(1+pi^(2)-2pix+x^(2))),x!=pi),(k,x=pi):}`
f(x) is continuous function at `x=pi` then k is equal to

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