`tan 70^(@) - tan 20^(@)=`

tan10^(@) tan 20^(@) tan 30^(@) tan 40^(@) tan 50^(@) tan 60^(@) tan 70^(@) tan 80^(@)=

If tan 20^(@) = lambda , " then " (tan 250^@ + tan 340^(@))/(tan 200^(@) - tan 110^(@))=

(i) If tan 20^(@) = lambda then show that (tan 610^(@) + tan 700^(@))/(tan 560^(@) - tan 470^(@))=(1-lambda^(2))/(1+lambda^(2))

tan 75^(@) - tan 30^@ - tan 75^(@) * tan 30^*(@) =

Prove that tan70^(@)-tan20^(@)=2tan50^(@) .

If Tan70^(@) - Tan20^(@) = k Cot40^(@) then k =

If tan 20^@ =p , " then " (tan 160^@ - tan 110^(@))/(1+ tan 160^(@) tan 110^(@))=

If tan20^(@) = lambda then show that (tan 160^(@) -tan 110^(@))/(1+tan160^(@).tan110^(@)) = (1-lambda^2)/(2lambda) .

tan 203^(@) + tan 22^(@) + tan 203^(@) tan 22^(@) =