(cot84^(@)*cot48^(@))/(cot66^(@)*cot78^(@))

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

Evaluate each of the following: cot12^(@)cot38^(@)cot52^(@)cot60^(@)cot78^(@)tan5^(@)tan25^(@)tan30^(@)tan65^(@)tan85^(@)

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

The value of (3+cot76^(@)cot16^(@))/(cot76^(@)+cot16^(@)) is

cot12^(@)*cot 24^(@)*cot28^(@)*cot32^(@)*cot48^(@)*cot88^(@)=…….. i) tan45 ii) 2tan15.tan45.tan75 iii) 2tan15.tan45.tan75 iv) tan15.tan45.tan75

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

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