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[" 8.tan "9^(@)" -tan "27^(@)" - tan "63...

[" 8.tan "9^(@)" -tan "27^(@)" - tan "63^(@)+tan81^(@)" का मान क्या हे? "],[[" (a) "1," (b) "2," (c) "3]]

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

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

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

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

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