The value of `Tan37^(@)`

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^(@))=

The value of (tan70^(@)-tan20^(@))/(tan50^(@))=

The value of (tan 47^(@) + tan 43^(@))/(1-tan 47^(@) tan 43^(@)) is

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 ((1+tan8^(@))(1+tan37^(@)))/((1+tan22^(@))(1+tan23^(@)))

The value of tan10^(@)tan50^(@)tan70^(@) is