Answer:
option b , t = 4 [tex]\sqrt{2}[/tex] , u= 7
Step-by-step explanation:
sin 45 = 1/[tex]\sqrt{2}[/tex]
4 / t =1/[tex]\sqrt{2}[/tex]
t = 4[tex]\sqrt{2}[/tex]
u = 4+3 = 7
