if a+b+c=π,then cot a.cotb+cot b.cot c+cot c.cot a=
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Hola‼.........❤✌
So, the final answer is 1.
Hope it’s helpful...
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Step-by-step explanation:
a+b=180-c
=cot(a+b)=-cotc
=cotacotb-1/cota+cotb=-cotc
=-cotc(cota+cotb)=cotacotb-1
=-cotccota-cotccotb-cotacob=-1
=divide by-
=then cotacotb+cotbcotc+cotacotc=1
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