Question

taxa anual equivalente a 2% a.m. determine

Answer 1

Só usar a fórmula que retorna os juros, mas sem a parte do capital:

$Taxa_{anual} = (1+i)^n-1\\\\ Taxa_{anual} = (1+0,02)^{12}-1\\\\ Taxa_{anual} = 1,02^{12}-1\\\\ Taxa_{anual} \approx 1,268242-1\\\\ Taxa_{anual} \approx 0,268242\ \ (\ \approx\ 26,8242\%\ a.a.\ )$

Espero ter ajudado.
Bons estudos!