Find sin (E) given the triangle. 39 36 15

1. Use the diagram below to derive the Law of Sines in the case of an obtuse triangle. C A b T 7 С 27 a T B

D Name: Topic: Revisiting Right Triangles 1. Which of the following is true? 6 a. sin(A) = - 6 b. cos(4) = 10 10 2. Here is triangle ABC: 0 E 13 C 12 B 3. Triangle DEF is similar to triangle ABC. Homework #5.2 Class: C 5 10 B 8 C B c. sin(C) = d. cos(C) = a. Express the length of segment AB using sine or cosine. 6 10 b. Express the length of segment BC using sine or cosine. 8 10 Date: LHS Math 3 CP1 a. What is the length of segment DE? What is the lengt segment EF? Explain how you know. b. Explain why the length of segment DE is cos(D) ar length of segment EF is sin(D). 177