tan4° + tan47° + tan43° + tan86° = ?
First take the terms tan4o + tan86o
And tan47o + tan43o
USE the formula:-
tan(A+B) = (tanA + tanB) / (1 - tanA.tanB)
Solve both of them and add their answers, u will get ur answer
And tan47o + tan43o
USE the formula:-
tan(A+B) = (tanA + tanB) / (1 - tanA.tanB)
Solve both of them and add their answers, u will get ur answer