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In acute angled triangle A B C ,A D is t...

In acute angled triangle `A B C ,A D` is the altitude. Circle drawn with `A D` as its diameter cuts `A Ba n dA Ca tPa n dQ ,` respectively. Length of `P Q` is equal to `/(2R)` (b) `(a b c)/(4R^2)` (c)`2RsinAsinBsinC` (d) `delta/R`

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AD=CsinB
`/_APQ`
`(PQ)/sinA=2R'=AD=CsinB`
`PQ=CsinBsinA=c*b/(2R)*sinA`
`D/R=PQ`
`PQ=CsinBsinA`
`PQ=2RsinCsinBsinA`
Option B and D is correct.
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