1.

If A+B+C= 360^(@) " then " cot""(A)/(4)+ cot ""(B)/(4) + cot ""(C)/(4)=

Answer»

`sin""(A)/(4)sin""(B)/(4)sin""(C )/(4)`
`cos""(A)/(4)cos""(B)/(4)cos""(C )/(4)`
`TAN""(A)/(4)tan""(B)/(4)tan""(C )/(4)`
`cot""(A)/(4)cot""(B)/(4)cot""(C )/(4)`

ANSWER :D


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