सिद्ध करे की `tan9^(@).tan27^(@).tan45^(@).tan63^(@).tan81^(@)=1`

tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=

tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=?

Find tan15^(@).tan25^(@).tan45^(@).tan65^(@).tan75^(@) .

tan9^(@)+tan36^(@)+tan9^(@)tan36^(@)=1

tan9^(0)-tan27^(0)-tan63^(@)+tan81^(@)

tan 9^(@) - tan 27^(@) - tan 63^(@) + tan 81^(@) =

Statement-1: sin^(2)6^(@) + sin^(2)12^(@) + sin^(2)18^(@) +……..+ sin^(2)84^(@)=7 Statement-2: tan9^(@) tan27^(@) tan45^(@) tan36^(@) tan81^(@)=1 Statement-3: (tan(pi/4) + cot(pi/4) + " cosec " pi/4) (tan(pi/4) + cot(pi/4) - " cosec "pi/4) = sec ^(2)pi/3

Statement-1: sin^(2)6^(@) + sin^(2)12^(@) + sin^(2)18^(@) +……..+ sin^(2)84^(@)=7 Statement-2: tan9^(@) tan27^(@) tan45^(@) tan36^(@) tan81^(@)=1 Statement-3: (tan(pi/4) + cot(pi/4) + " cosec " pi/4) (tan(pi/4) + cot(pi/4) - " cosec "pi/4) = sec ^(2)pi/3

Value of tan25^(@)tan35^(@)tan45^(@)tan55^(@)tan65^(@) is