Question

Please help. Trig: Laws of Cosines
If a rhombus whose side measures 14 and the smaller angle is 80*, find the length of the larger diagonal, to the nearest tenth.

Answer 1

Answer:

21.4 units

Step-by-step explanation:

Greater angle: 180 - 80 = 100

diagonal² = 14² + 14² - 2(14)(14)cos(100)

diagonal² = 460.0700856454

diagonal = 21.4492444073