Final answer:
The triangle can be solved using the Law of Sines, and the correct solution is option (b) A = 40°, B = 48.7°, C = 91.3°.
Step-by-step explanation:
The given triangle has side lengths b=1, c=7 and an angle measure of a=40°.
To solve this triangle, we can use the Law of Sines.
According to the Law of Sines, the ratio of the length of a side of a triangle to the sine of its opposite angle is constant.
By applying the Law of Sines, we can find that A = 40°, B = 48.7°, and C = 91.3°.
Therefore, the correct option is (b) A = 40°, B = 48.7°, C = 91.3°.