Question

Please help. Trig: Laws of Cosines
If a rhombus whose side measures 4 and the smaller angle is 64*, find the length of the larger diagonal, to the nearest tenth.

Answer 1

Answer:

6.8

Step-by-step explanation:

Greater angle: 180 - 64 = 116

Diagonal² = 4² + 4² - 2(4)(4)cos(116)

Diagonal² = 46.0278767

Diagonal = 6.784384769

Answer 2

Step-by-step explanation:

Greater angle: 180 - 64 = 116

Diagonal² = 4² + 4² - 2(4)(4)cos(116)

Diagonal² = 46.0278767

Diagonal = 6.784384769