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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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Find the values of tan 9^@-tan 27^@-tan 63^@ + tan 81^@

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

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

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

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

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

Prove that : tan 20^0 tan 40^0 tan 60^0 tan 80^0 =3

Prove tan 20^0 tan 30^0 tan 40^0 tan 80^0=1

Prove tan 9^@. tan 21^@.tan 69^@.tan 81^@=1