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

Given that: A = cot 30^(@) and B = (cot60^(@) cot30^(@) +1)/(cot30^(@) - cot 60^(@)) , which of the relations stated below is true ?

What is cot 1^(@) cot 23^(@) cot 45^(@) cot 67^(@) cot 89^(@) equal to ?

Evaluate : cot 10^(@) .cot20^(@).cot30^(@).cot40^(@) ………cot90^(@) .

cot60^(@)xxtan30^(@)= ?

Evaluate : (sin 30^(@) + tan45^(@) - cosec 60^(@))/(sec 30^(@) + cos 60^(@) + cot 45^(@))

The value of sin 0^(@) + cos 30^(@) - tan 45^(@) + cosec 60^(@) + cot 90^(@) is equal to

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

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

Prove that: cot A+cot(60^(@)+A)-cot(60^(@)-A)=3cot3A