`(1+cot 85^@)/cot85^@. (1+cot 95^@)/cot95^@ .(1+cot130^@)/cot130^@. (1+cot 140^@)/cot140^@=`

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

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

cot7(1^@)/2-cot37(1^@)/2-cot52(1^@)/2+cot82(1^@)/2 =

Simplify (cot 55^(@)cot35^(@)-1)/(cot55^(@)+cot35^(@))

cot^-1 (21) + cot^-1(13) + cot^-1 (8) =

The value of cot 5^(@).cot 10^(@).cot 15^(@)……cot 85^(@) is

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

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

The value of (1-cot2^(0))(1-cot5^(0))(1-cot11^(0))(1-cot34^(0))(1-cot40^(@))(1-cot43^(0))(1+cot45^(@)) is