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Let f(x)={(1-sin^3x)/(3cos^2x) if x< pi...

Let `f(x)={(1-sin^3x)/(3cos^2x) if x< pi/2, a if x=pi/2` . If `f(x)` is continuous at `x=pi/2` b(1-sinx)/(pi-2x)^2, if x>pi/2 find `a` and b. .

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