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If a = 8,b=6 , C= 4 find tan B/2....

If a = 8,b=6 , C= 4 find tan B/2.

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If a = 8 , b = 6, c = 4 then s = (a+b+c)/2 = (8+6+4)/2 = 9
`therefore tanB/2 = sqrt((s-c)(s-a))/(s(s-b))`
= `sqrt((9-4)(9-8)/9(9-6)) = sqrt(5xx1)/(9xx3) = `sqrt5/3sqrt3`
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