` cot 12^(@) cot 38^(@) cot 52^(@) cot 60^(@) cot 78^(@)` का मान होगा -

cot6^(0)cot42^(0)cot66^(@)cot78^(@)=1

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

cot 16^(@) cot 44^(@) + cot 44^(@) cot 76^(@) - cot 76^(@) cot 16^(@)=

Show that, cot 1^(@), cot 2^(@) cot 3^(@).....cot 87^(@) cot 88^(@) cot 89^(@) = 1

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

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

The value of cot 15^(@) cot 16^(@) cot 17^(@) . . . . . cot 73^(@) cot 74^(@) cot 75^(@) is :

Show that: (cot 30^(@) cot 60^(@) - 1)/(cot 30^(@) + cot 60^(@)) = cot 90^(@)

If A=tan6^(@) tan42^(@), B=cot66^(@) cot78^(@) then

cot 6^0 cot 42^0 cot 66^0 cot 78^0=1