The value of `tan72^(@).tan18^(@)` is

The value of tan27^(@)+tan18^(@)+tan27^(@)tan18^(@), is -A) an rrational number (B) rational which is an integer (C) integer which is prime (D) integer which is not prime

The value of tan 57^(@) - tan 12^(@) - tan 57^(@) tan 12^(@) is

The value of tan 7^(@) tan 23^(@) tan39^(@) tan 60^(@) tan 51^(@) tan 67^(@) tan 83^(@) is

The value of tan 6^(@) tan 42^(@) tan 66^(@) tan 78^(@) is

Given that tan(A+B)=(tan A+tan B)/(1-tan A tan B) find the values of tan75^(@) and tan90^(@) by taking suitable values

The value of (tan 70^(@) -tan 20^(@))/(tan 50^(@)) is-

The value of (tan 70^(@) - tan 20^(@))/( tan 50^(@))=

The value of (tan 70^(@) - tan 20^(@))/tan 50^(@) =