The Law of Cosines Quick Check

2 of 52 of 5 Items
Question
Use the Law of Cosines, b2=a2+c2−2ac⋅cosB , to find the value of angle B in a right triangle, where a=9 , b=40 , and c=41 .(1 point)
Responses

84.55 degrees
84.55 degrees

90.01 degrees
90.01 degrees

77.32 degrees
77.32 degrees

78.01 degrees