Ask Question
18 May, 05:07

Find an exact value cos (19pi/12)

+5
Answers (1)
  1. 18 May, 06:21
    0
    19 π / 12 = 19 * 180° / 12 = 285 °

    cos (19 π / 12) = cos 285° = cos ( - 75°) = cos 75°

    cos 75° = cos (45° + 30°) = cos 45° cos 30° - sin 45° sin 30° =

    = (√2 / 2 · √3/2) - (√2 / 2 · 1/2) = √6/4 - √2/4 =

    = (√6 - √2) / 4
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Find an exact value cos (19pi/12) ...” 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