Question

ME AJUDEM POR FAVOR!!!!!

Answer 1

cos45° = 3/y
√2/2 = 3/y
y = 6 / √2

(6/√2)² = 3² + x²
72 = 9 + x²
x = 3√7

cos30° = x/12
√3/2 = x/12
2x = 12√3
x = 6√3

sen30º = y/12
1/2 = y/12
y = 6

sena = x/ 4√3
2√13/13 = x/ 4√3
13x = 2√13 * 4√3
x ≈ 3,84