The value of `tan 9^@ + tan 36^@ + tan 9^@. tan 36^@` is equal to

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

The value of tan9^(@)+tan36^(@)+tan9^(@)*tan36^(@) is equal to

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

If sin A = (3)/(5) and cos B = (12)/(13) . Then the value of (tan A - tan B)/(1 + tan A tan B) is equal to

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

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

The value of tan 3 A - tan A is equal to

The value of tan1^(@)tan46^(@)-tan46^(@)+tan1^(@) is equal to