1. **State the problem:** Solve the equation $$\tan x + 1 = -\sqrt{3} - \sqrt{3} \cot x$$ for $$x$$ in the interval $$[0, 2\pi)$$.
2. **Rewrite the equation:** Recall that $$\cot x = \frac{1}{\tan x}$$, so substitute to get:
$$\tan x + 1 = -\sqrt{3} - \sqrt{3} \cdot \frac{1}{\tan x}$$
3. **Multiply both sides by $$\tan x$$ to clear the denominator:**
$$\tan x \cdot \tan x + 1 \cdot \tan x = -\sqrt{3} \tan x - \sqrt{3}$$
which is
$$\tan^2 x + \tan x = -\sqrt{3} \tan x - \sqrt{3}$$
4. **Bring all terms to one side:**
$$\tan^2 x + \tan x + \sqrt{3} \tan x + \sqrt{3} = 0$$
5. **Combine like terms:**
$$\tan^2 x + (1 + \sqrt{3}) \tan x + \sqrt{3} = 0$$
6. **Let $$t = \tan x$$ and solve the quadratic:**
$$t^2 + (1 + \sqrt{3}) t + \sqrt{3} = 0$$
7. **Use the quadratic formula:**
$$t = \frac{-(1 + \sqrt{3}) \pm \sqrt{(1 + \sqrt{3})^2 - 4 \cdot 1 \cdot \sqrt{3}}}{2}$$
8. **Calculate the discriminant:**
$$(1 + \sqrt{3})^2 - 4 \sqrt{3} = (1 + 2\sqrt{3} + 3) - 4\sqrt{3} = 4 + 2\sqrt{3} - 4\sqrt{3} = 4 - 2\sqrt{3}$$
9. **Simplify the square root:**
$$\sqrt{4 - 2\sqrt{3}}$$
Note that $$4 - 2\sqrt{3} = (\sqrt{3} - 1)^2$$, so
$$\sqrt{4 - 2\sqrt{3}} = \sqrt{3} - 1$$
10. **Substitute back:**
$$t = \frac{-(1 + \sqrt{3}) \pm (\sqrt{3} - 1)}{2}$$
11. **Calculate the two roots:**
- For the plus sign:
$$t = \frac{-(1 + \sqrt{3}) + (\sqrt{3} - 1)}{2} = \frac{-1 - \sqrt{3} + \sqrt{3} - 1}{2} = \frac{-2}{2} = -1$$
- For the minus sign:
$$t = \frac{-(1 + \sqrt{3}) - (\sqrt{3} - 1)}{2} = \frac{-1 - \sqrt{3} - \sqrt{3} + 1}{2} = \frac{-2\sqrt{3}}{2} = -\sqrt{3}$$
12. **Solve for $$x$$:**
- When $$\tan x = -1$$, $$x = \frac{3\pi}{4}, \frac{7\pi}{4}$$ in $$[0, 2\pi)$$.
- When $$\tan x = -\sqrt{3}$$, $$x = \frac{5\pi}{6}, \frac{11\pi}{6}$$ in $$[0, 2\pi)$$.
**Final answer:**
$$x = \frac{3\pi}{4}, \frac{7\pi}{4}, \frac{5\pi}{6}, \frac{11\pi}{6}$$
Tangent Cotangent Equation 0B7Cd7
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