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If tan.(C-A)/(2)=k cot.(B)/(2) then find...

If `tan.(C-A)/(2)=k cot.(B)/(2)` then find k .

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The correct Answer is:
`(c-a)/(c+a)`
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SRISIRI PUBLICATION-PROPERTIES OF TRIANGLES-LAQ ,SAQ,VSAQ (2DHARDQ) (3DMIS.Q)
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