Ask Question
10 September, 19:07

Cos 2x cos x - sin 2x sin x = radical 3 / 2

+1
Answers (1)
  1. 10 September, 19:28
    0
    Cos2x. cosx - sin2x. sinx = cos (2x+x)

    cos (2x+x) = cos (3x) = (√3) / 2

    cos⁻¹ (√3/2) = 30°, so x = 30/3 = 10°
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Cos 2x cos x - sin 2x sin x = radical 3 / 2 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers