" Cot1' cot2' cot3'................"cot89'.?

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

(1)/(tan 3 A - tan A)- (1)/(cot 3 A - cot A)= .............. A) tan A B) tan 2A C) cot A D) cot 2A

Find the value of log cot1^(@)+log cot2^(@)+log cot3^(@)+......+log cot89^(@)

If 4n alpha=pi then cot alpha cot2 alpha cot3 alpha...cot(2n-1)alpha n in Z is equal to

cot x cot 2x-cot 2x cot3x-cot3x cotx=1

The value of (tan55^(@))/(cot35^(@))+cot1^(0)cot2^(0)cot3^(0)...cot90^(@), is -2 (b) 2(c)1(d)0

What is the value of the expression (Cot 1^@ cot2^@ cot3^@ Cot4^@ co5t^@ _____ Cot 90^@ (A) O (B) 1 (C ) 2 (D) 1/2

The simplest value of cot90^@ cot 27^@ cot 3^@ cot 81^@ is

cot x*cot2x-cot2x*cot3x-cot3x*cot x=1