calcular tan ( 45-30) si tan 45= 1 y tan 30 = 0,57
[tex][tex]tan 45 = 1 , \ \tan 30 = 1/\sqrt{3} \\tan (45 - 30) \\1 - 1/\sqrt{3} = \\(\sqrt{3} - 1)/\sqrt{3} = \\ = 0.422649[/tex][/tex]