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Let `A B C` be a triangle with incentre at `I` Also, let `P` and `Q` be the feet of perpendiculars from `A` to `BI` and `CI` respectively. Then which of the following results are correct? `(A P)/(B I)=(sinB/2cosC/2)/(sinA/2)` (b) `(A Q)/(C I)=(sinC/2cosB/2)/(sinA/2)` `(A P)/(B I)=(sinC/2cosB/2)/(sinA/2)` (d) `(A P)/(B I)+(A Q)/(C I)=sqrt(3)if/_A=60^0`

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