Question

usaria a lei dos cossenos para resolver ?

Answer 1

$x^{2} = b^{2} + a^{2} - 2ab.cos \alpha$


x^2 = (22,25)^2 + (23,87)^2 - 2(22,25.23.87).cos70
x^2 = 517,5625 + 569,7769 - 363,2990
x^2 = 724,0404
x = 26,9079