Using the cosine theorem we have: C ^ 2 = A ^ 2 + B ^ 2 - 2 * A * B * cos (theta) Substituting values we have: x ^ 2 = 4 ^ 2 + 4.7 ^ 2 - 2 * 4 * 4.7 * cos (41) Answer: The equation to solve for x is: x ^ 2 = 4 ^ 2 + 4.7 ^ 2 - 2 * 4 * 4.7 * cos (41) option 3