cot9^(@)*cot27^(@)*cot63^(@)*cot81^(@)

cot12^(@)*cot 24^(@)*cot28^(@)*cot32^(@)*cot48^(@)*cot88^(@)=……..

Show that: cot16^(@)*cot44^(@)+cot44^(@)*cot76^(@)-cot76^(@)*cot16^(@)=3

cot10^(@)cot20^(@)cot60^(@)cot70^(@)cot80^(@)=

cot12^(@)cot102^(@)+cot102^(@)cot66^(@)+cot66^(@)cot12^(@) =

The value of cot41^(@).cot42^(@).cot43^(@).cot44^(@).cot45^(@).cot46^(@).cot.47^(@).cot48^(@).cot49^(@)

The value of cot5^(@)*cot15^(@)* cot 25^(@)* cot 35^(@)* cot45^(@) * cot 55^(@) * cot65^(@) * cot 75^(@) * cot 85^(@) is ________

The value of (cot25^(@)cot35^(@)+cot95^(@)cot145^(@)+cot85^(@)cot155^(@)) is equal

The value of (cot84^(@)cot48^(@))/(cot66^(@)cot78^(@)) is equal to