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The value of (tan 9^(@)-tan 27^(@)-tan 6...

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

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

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

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

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

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

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

Prove that tan A. (tan 60^(@) +A). Tan (60^(@)-A)=tan 3A and hence find the value of tan 6^(@) tan 42^(@) tan 66^(@) tan 78^(@) .

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