Question

Como resolver lei dos cosseno? Preciso do cálculo

Answer 1

(75√2)^2= (2√2)^2+AC^2-2.75√2.2√2.cos 45°

5625.2= 8+ AC^2 -300.2.√2/2

11250=8+AC^2 - 300√2

11250-8= AC^2- 300√2

11242= AC^2 -300√2

11242+300√2= AC^2
11242+300.1,41= AC^2
11242+ 423= AC^2
11665= AC^2
AC= √11665
AC= 108,004