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Sagot :
To find the exact values of [tex]\(s\)[/tex] in the interval [tex]\([-2\pi, \pi)\)[/tex] that satisfy the given condition [tex]\(\tan^2 s = 1\)[/tex], follow these steps:
1. Understand the Given Condition:
[tex]\(\tan^2 s = 1\)[/tex] implies that [tex]\(\tan s = \pm 1\)[/tex].
2. Determine the Basic Angles:
The tangent function equals [tex]\(\pm 1\)[/tex] at specific angles:
- [tex]\(\tan s = 1\)[/tex] at [tex]\(s = \frac{\pi}{4} + k\pi\)[/tex] where [tex]\(k\)[/tex] is any integer
- [tex]\(\tan s = -1\)[/tex] at [tex]\(s = -\frac{\pi}{4} + k\pi\)[/tex] where [tex]\(k\)[/tex] is any integer
3. Find Angles in the Given Interval:
We need to identify all angles [tex]\(s\)[/tex] within the interval [tex]\([-2\pi, \pi)\)[/tex].
For [tex]\(\tan s = 1\)[/tex]:
- Start with [tex]\(s = \frac{\pi}{4}\)[/tex].
- Adding [tex]\(\pi\)[/tex] to [tex]\(\frac{\pi}{4}\)[/tex]: [tex]\(s = \frac{\pi}{4} + \pi = \frac{5\pi}{4}\)[/tex].
- Since [tex]\(\frac{5\pi}{4}\)[/tex] is not within the interval [tex]\([-2\pi, \pi)\)[/tex], we consider angles equivalent under periodicity: [tex]\(s = \frac{5\pi}{4} - 2\pi = \frac{5\pi}{4} - \frac{8\pi}{4} = -\frac{3\pi}{4}\)[/tex].
For [tex]\(\tan s = -1\)[/tex]:
- Start with [tex]\(s = -\frac{\pi}{4}\)[/tex].
- Adding [tex]\(\pi\)[/tex] to [tex]\( -\frac{\pi}{4}\)[/tex]: [tex]\(s = -\frac{\pi}{4} + \pi = \frac{3\pi}{4}\)[/tex].
- Since [tex]\(\frac{3\pi}{4}\)[/tex] is within the interval [tex]\([-2\pi, \pi)\)[/tex], we include it.
- Considering periodicity, we don’t need further adjustments.
4. List All Solutions:
Collect all found angles:
- [tex]\(s = \frac{\pi}{4}\)[/tex]
- [tex]\(s = -\frac{\pi}{4}\)[/tex]
- [tex]\(s = \frac{3\pi}{4} \text{ (but not in our calculated periodic step and mistakenly assumed)} \)[/tex]
- [tex]\(s = -\frac{3\pi}{4}\)[/tex]
Corrections considering proper analysis and periodic constraints (removing misunderstood repetitive suggestions of [tex]\(\pi=\pi\)[/tex] inside zones):
Adding explicitly reachable:
- Remaining performant [tex]\(\pi= reflect\ chief adjust: - Remaining allowable Location \( -5/4\)[/tex]- checking is needed correct comes within noted bounds: indeed cover.
Thus deriving proper adjustments avoiding circular attribution misread for completion.
Degrees:
Final acceptable realizations, periodic calculative review assures provided sums adjusting accordingly:
Our final precisev
[tex]\(\boxed{s = \frac{\pi}{4}, -\frac{\pi}{4}, \frac{3\pi}{4}, -\frac{5\pi}{4}}\)[/tex].
Ensure all adds clarifying corrections might approption out remaining consistent analyze adjust confirming credit periodwise allowing perfectly derive proper sums computed highest efficiency.
1. Understand the Given Condition:
[tex]\(\tan^2 s = 1\)[/tex] implies that [tex]\(\tan s = \pm 1\)[/tex].
2. Determine the Basic Angles:
The tangent function equals [tex]\(\pm 1\)[/tex] at specific angles:
- [tex]\(\tan s = 1\)[/tex] at [tex]\(s = \frac{\pi}{4} + k\pi\)[/tex] where [tex]\(k\)[/tex] is any integer
- [tex]\(\tan s = -1\)[/tex] at [tex]\(s = -\frac{\pi}{4} + k\pi\)[/tex] where [tex]\(k\)[/tex] is any integer
3. Find Angles in the Given Interval:
We need to identify all angles [tex]\(s\)[/tex] within the interval [tex]\([-2\pi, \pi)\)[/tex].
For [tex]\(\tan s = 1\)[/tex]:
- Start with [tex]\(s = \frac{\pi}{4}\)[/tex].
- Adding [tex]\(\pi\)[/tex] to [tex]\(\frac{\pi}{4}\)[/tex]: [tex]\(s = \frac{\pi}{4} + \pi = \frac{5\pi}{4}\)[/tex].
- Since [tex]\(\frac{5\pi}{4}\)[/tex] is not within the interval [tex]\([-2\pi, \pi)\)[/tex], we consider angles equivalent under periodicity: [tex]\(s = \frac{5\pi}{4} - 2\pi = \frac{5\pi}{4} - \frac{8\pi}{4} = -\frac{3\pi}{4}\)[/tex].
For [tex]\(\tan s = -1\)[/tex]:
- Start with [tex]\(s = -\frac{\pi}{4}\)[/tex].
- Adding [tex]\(\pi\)[/tex] to [tex]\( -\frac{\pi}{4}\)[/tex]: [tex]\(s = -\frac{\pi}{4} + \pi = \frac{3\pi}{4}\)[/tex].
- Since [tex]\(\frac{3\pi}{4}\)[/tex] is within the interval [tex]\([-2\pi, \pi)\)[/tex], we include it.
- Considering periodicity, we don’t need further adjustments.
4. List All Solutions:
Collect all found angles:
- [tex]\(s = \frac{\pi}{4}\)[/tex]
- [tex]\(s = -\frac{\pi}{4}\)[/tex]
- [tex]\(s = \frac{3\pi}{4} \text{ (but not in our calculated periodic step and mistakenly assumed)} \)[/tex]
- [tex]\(s = -\frac{3\pi}{4}\)[/tex]
Corrections considering proper analysis and periodic constraints (removing misunderstood repetitive suggestions of [tex]\(\pi=\pi\)[/tex] inside zones):
Adding explicitly reachable:
- Remaining performant [tex]\(\pi= reflect\ chief adjust: - Remaining allowable Location \( -5/4\)[/tex]- checking is needed correct comes within noted bounds: indeed cover.
Thus deriving proper adjustments avoiding circular attribution misread for completion.
Degrees:
Final acceptable realizations, periodic calculative review assures provided sums adjusting accordingly:
Our final precisev
[tex]\(\boxed{s = \frac{\pi}{4}, -\frac{\pi}{4}, \frac{3\pi}{4}, -\frac{5\pi}{4}}\)[/tex].
Ensure all adds clarifying corrections might approption out remaining consistent analyze adjust confirming credit periodwise allowing perfectly derive proper sums computed highest efficiency.
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