TanA/2.cotA/2
I can't verify it help me
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Generally tan is a reciprocal of cot
so tan x . cot x =1
let us assume x= A/2
so now tan A/2.cotA/2= 1
so tan x . cot x =1
let us assume x= A/2
so now tan A/2.cotA/2= 1
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