Step-by-step explanation:
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∆ What is the meaning of law of sines?
• The Law of Sines is the relationship between the sides and angles of non-right (oblique) triangles . Simply, it states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all sides and angles in a given triangle.
∆ What is law of sines and cosines?
• The Law of Sines establishes a relationship between the angles and the side lengths of ΔABC: a/sin(A) = b/sin(B) = c/sin(C).
This is a manifestation of the fact that cosine, unlike sine, changes its sign in the
range 0° - 180° of valid angles of a triangle.
∆ What is law of sines used for in real life?
• You can use the Law of Sines to solve real-life problems involving oblique triangles. For instance, in Exercise 44 on page 438, you can use the Law of Sines to determine the length of the shadow of the Leaning Tower of Pisa
