Ask Question
2 August, 23:14

What is the exact value of cos 5pi/4 radians?

+3
Answers (1)
  1. 2 August, 23:25
    0
    -Radical two (square root of two) / 2

    Because:

    5pi/4 = 225 the reference angle for that is 45 degrees, cos 45 = Radical two (square root of two) / 2 and because 225 is in quadrant three and only tangent is positive in quadrant 3, the cos is negative
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “What is the exact value of cos 5pi/4 radians? ...” 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