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

(tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=)/((A)1/2)=

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

The value of tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@) is

The value of (tan 9^(@)-tan 27^(@)-tan 63^(@)+tan 81^(@)) is-

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

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

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

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

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