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In a A B C , if tanA:tanB :tanC=3:4:5,...

In a ` A B C ,` if `tanA:tanB :tanC=3:4:5,` then the value of `sinA sinB sinC` is equal to (a)`2/(sqrt(5))` (b) `(2sqrt(5))/7` `(2sqrt(5))/9` (d) `2/(3sqrt(5))`

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In a A B C , if tanA:tanB :tanC=3:4:5, then the value of sinA sinB sinC is equal to (a) 2/(sqrt(5)) (b) (2sqrt(5))/7 (c) (2sqrt(5))/9 (d) 2/(3sqrt(5))

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