Answer:
Step-by-step explanation:
Cos(65°) = √(1 + cos(130°)) / 2
0.42=√(1 - 0.64)/2
0.42=√(0.36)/2
0.42²=√0.18²
4000g
x=8.48
Sin 45 = x/12
x=12 x sin 45
x=12 x .7071
