Answer:
B = 64.62
Step-by-step explanation:
Since this is a right triangle, we can use trig functions.
cos theta = adjacent/ hypotenuse
cos B = 3/7
Take the inverse cos of each side
cos ^-1 (cos ( B)) = cos ^-1 (3/7)
B =64.62306647
To the nearest hundredth
B = 64.62
