" Shan "9^(@)*tan27^(@)*tan45^(@)*tan63^(@)*tan81^(@)=1

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

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

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

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

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

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

Prove that: (a) tan 20^(@)tan40^(@)tan60^(@)tan 80^(@)=3 (b) tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=4

Prove that tan 9^(@) - tan 27^(@) -tan 63^(@) + tan 81^(@) =4