Answer:
[tex]BC=4.42[/tex]
Step-by-step explanation:
In, given figure:
AB=13
∠B=70°
we have to find BC ?
as,
[tex]cosA=\frac{Base}{Hypotenuse} \\\\[/tex]
Given cos(70°)≈0.34
cos(70°) [tex]=\frac{BC}{AB}[/tex]
[tex]0.34=\frac{BC}{13}\\\\ BC=0.34*13\\\\BC=4.42[/tex]
The measurement of BC is
[tex]BC=4.42[/tex]
