Saved Bookmarks
| 1. |
Evaluate each of the following:cos–1(cos 5) |
|
Answer» cos–1(cos x) = x Provided x ϵ [0,π] ≈ [0,3.14] And in our equation x is 5 which does not lie in the above range. We know cos[2π – x] = cos[x] ∴ cos(2π – 5) = cos(5) Also 2π–5 belongs in [0,π] ∴ cos–1(cos 5) = 2π–5 |
|