1. The standard form of the Law of Cosines for cos B = a2 + c2 − b2 / 2ac is ________.
2. When solving an oblique triangle given three sides, use the ________ form of the Law of Cosines to solve for an angle.
3. When solving an oblique triangle given two sides and their included angle, use the ________ form of the Law of Cosines to solve for the remaining side.
4. The Law of Cosines can be used to establish a formula for the area of a triangle called ________ ________ Formula.