Answer:
cos 45=V2/2=9/y
so y*V2=2*9
y=2*9/V2=9V2
y=9V2
Step-by-step explanation:
y=17.13307
Cos45=0.5253
So
0.5253=9/y cross multiply
0.5253y=9. Divide both side by 0.5253
y=9/0.5253
