Ask Question
10 September, 12:59

Given a triangle with b = 3, c = 9, and A = 21 ° what is the length of a? Round to the nearest tenth

+1
Answers (1)
  1. 10 September, 15:10
    0
    Use the Law of Cosines

    a^2 = b^2 + c^2 - 2bc * cos (A)

    a^2 = 9 + 81 - (54 * 0.93358)

    a^2 = 90 - 50.41332

    a^2 = 39.58668

    a = 6.2917946565

    a = 6.3 (rounded)
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Given a triangle with b = 3, c = 9, and A = 21 ° what is the length of a? Round to the nearest tenth ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers