If f(x)=0 is a quadratic equation such ...

If `f(x)=0` is a quadratic equation such that `f(-pi)=f(pi)=0` and `f(pi/2)=-(3pi^2)/4,` then `lim_(x->-pi)(f(x))/("sin"(sinx)` is equal to (a)`0` (b) `pi` (c) `2pi` (d) none of these

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