**When to use law of sines and law of cosines**. Depending on the triangle you have if you have 3 pieces other than three angles you can use the one that gives you one unknown to solve for that unknown. The law of cosines is a2 b2 c2 – 2bccosine A. The law of cosines is c2 a2 b2 2ab. For problems in which we use the Law of sines given one angle and two sides there may be one possible triangle two possible triangles or no possible triangles. You use the law of cosines to relate the 3 sides of a triangle to one. 25Basically you use whichever is easiest depending on what is given. Law of cosines formula to find the side or the angle in a triangle. Law of cosines uses all three lengths with one of the angles. Its also useful for finding a missing side when given the other sides and one angle measure. If you are given all three sides or two sides and the angle between them think law of cosines. To aid in your explanation you may refer to specific problems from the text. Provide general guidelines in your own words for each law that can be applied to any triangle situation with which you are presented.

A discussion of The law of cosines. – 3 missing angles and 3 sides provided SSS triangles – 1 missing side but its corresponding angle is provided SAS triangles. 7The Law of Cosines is c2 a2 b2 – 2abCosC. M4 PRECALCULUS AND ADVANCED TOPICS NYS COMMON CORE MATHEMATICS CURRICULUM Lesson 10 Lesson 10. When to use law of sines and law of cosines Model and practice problems worked out step by step with pictures. With its help the angles of a triangle can be determined if all its sides are known. 30The cosine rule relates the cosine of an angle of a triangle to the sides of the triangle. There are six different scenarios related to the ambiguous case of the Law of sines. Putting the Law of Cosines and the Law of Sines to Use This work is licensed under a 191 This work is derived from Eureka Math and licensed by Great Minds. In trigonometry the law of sines and cosines is an equation relating the lengths of the sides to any triangle with the sines of the angles. Solving triangles using the law of cosines This law is mostly useful for finding an angle measure when given all side lengths. Describe in detail when to use the law of cosines the law of sines and the law of sines with the ambiguous case. Not just a right triangle.

## When to use law of sines and law of cosines Describe in detail when to use the law of cosines the law of sines and the law of sines with the ambiguous case.

*When to use law of sines and law of cosines*. In trigonometry the Law of Sines relates the sides and angles of trianglesGiven the triangle below where A B and C are the angle measures of the triangle and a b and c are its sides the Law of Sines states. Three result in one triangle one results in two triangles and two result in no triangle. When should you use law of cosines.

So in each case you have four unknowns. Generally you use the Law of Cosines when you have. Provide general guidelines in your own words for each law that can be applied to any triangle situation with which you are presented.

The law of sines and cosines helps us solving triangles. The Law of Sines is SinAa SinBb. If you are given any angle and the side opposite it and whatever else think law of sines.

Your response must include. The law of sines is asine A bsine B csine B. To aid in your explanation you may refer to specific problems from the text.

These two rules work in any triangle. With its help we can determine any one of these four elements if other three are. Generally the format on the left is used to find an unknown side while the format on the right is used to find an unknown angle.

The sine rules gives the ratio of the sine of two angles of a triangle which equals to the ratio of the corresponding opposite sides. 30Law of sines uses two angles and their two opposite lengths.

### When to use law of sines and law of cosines 30Law of sines uses two angles and their two opposite lengths.

__When to use law of sines and law of cosines__. The sine rules gives the ratio of the sine of two angles of a triangle which equals to the ratio of the corresponding opposite sides. Generally the format on the left is used to find an unknown side while the format on the right is used to find an unknown angle. With its help we can determine any one of these four elements if other three are. These two rules work in any triangle. To aid in your explanation you may refer to specific problems from the text. The law of sines is asine A bsine B csine B. Your response must include. If you are given any angle and the side opposite it and whatever else think law of sines. The Law of Sines is SinAa SinBb. The law of sines and cosines helps us solving triangles. Provide general guidelines in your own words for each law that can be applied to any triangle situation with which you are presented.

Generally you use the Law of Cosines when you have. So in each case you have four unknowns. When to use law of sines and law of cosines When should you use law of cosines. Three result in one triangle one results in two triangles and two result in no triangle. In trigonometry the Law of Sines relates the sides and angles of trianglesGiven the triangle below where A B and C are the angle measures of the triangle and a b and c are its sides the Law of Sines states.

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