Assertion(A) `tan 20^@ + tan 40^@ + sqrt3 tan 20^@ tan 40^@ = sqrt3` Reason (R) : If `tan( A+B)=k` , then `tan A+tan B+ k tan A tan B = 0`

Assertion (A) tan20^(@)+tan40^(@)+sqrt(3)tan20^(@)tan40^(@)=sqrt(3)Rason(R):If tan(A+B)=k, then tan A+tan B+k tan A tan B=0

tan20^@+tan40^@+sqrt3tan20^@tan40^@=

tan 20^(@) + tan40^(@) + sqrt(3).tan 20^(@).tan 40^(@)=

Find tan 20^(@) + tan40^(@) + sqrt(3)tan20^(@)tan40^(@) .

tan 20^(@) tan 40^(@) tan 80^(@) = tan 60^(@)

Assertion (A): tan40^(@) + tan 80^(@) - sqrt(3)tan 40^(@) tan80^(@)=-sqrt(3) Reason ( R): tan( A + B) =tan A + tan B + tan(A + B) tan A tan B

tan20^(@)+tan40^(@)+sqrt(3)tan20^(@).tan40^(@)=?

Prove that tan 20^@tan 40^@ tan 60^@ tan 80^@ = 3