Question

sendo tg A =2 e tg B = 1 calcule tg ( A-B)

PRECISO DOS CALCULOS

Answer 1

$tg~(A-B)=\dfrac{tg~A-tg~B}{1+tg~A\cdot tg~B}\\\\\\tg~(A-B)=\dfrac{2-1}{1+2\cdot1}\\\\\\tg~(A-B)=\dfrac{1}{1+2}\\\\\\\boxed{\boxed{tg~(A-B)=\dfrac{1}{3}}}$