Ask Question
24 March, 08:22

List all x intercepts for y = - cos (1/2x + 1/5 pi) on the interval [-2/5pi, 4pi]

+2
Answers (1)
  1. 24 March, 08:35
    0
    - cos (1/2 x + 1/5 π) = 0 (and because if cos α = 0, α = π/2 + k π, k ∈ Z)

    1/2 x + π/5 = π/2 + k π, k ∈ Z

    1/2 x = π/2 - π/5 + k π / * 2

    x = π - 2π/5 + 2 k π

    x = 3/5 π + 2 k π = 0.6 π + 2 k π

    Answer:

    If k = 0: x 1 = 0.6 π = 3π/5

    k = 1 : x 2 = 2.6 π = 13π/5
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “List all x intercepts for y = - cos (1/2x + 1/5 pi) on the interval [-2/5pi, 4pi] ...” 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