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tan 9^0-tan 27^0-tan 63^0 + tan 81^0...

` tan 9^0-tan 27^0-tan 63^0 + tan 81^0`

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The value of tan 9^@ - tan 27^@ - tan 63^@ + tan 81^@ is equal to:

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

Value of tan9^@ - tan27^@ - tan63^@ + tan81^@ is ?

tan9-tan27-tan63+tan81=4

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

the value of tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@) is equal to

Prove that tan 9^circ - tan 27^circ -tan 63^circ + tan 81^circ = 4 .