Questions: Solve the equation for exact solutions over the interval [0,2π).
2 cot x + 1 = -1
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution set is .
(Type an exact answer, using π as needed. Type your answer in radians. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
B. The solution is the empty set.
Transcript text: Solve the equation for exact solutions over the interval $[0,2 \pi)$.
\[
2 \cot x+1=-1
\]
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution set is $\square$ \}.
(Type an exact answer, using $\pi$ as needed. Type your answer in radians. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
B. The solution is the empty set.
Solution
Solution Steps
Step 1: Isolate the Trigonometric Function
We start with the equation:
\[
2 \cot x + 1 = -1
\]
Rearranging gives:
\[
2 \cot x = -2
\]
Thus, we have:
\[
\cot x = -1
\]
Step 2: Convert to Tangent
Using the identity \(\cot x = \frac{1}{\tan x}\), we can rewrite the equation as:
\[
\frac{1}{\tan x} = -1
\]
This leads to:
\[
\tan x = -1
\]
Step 3: Find Solutions in the Interval
The solutions to \(\tan x = -1\) occur at:
\[
x = \frac{3\pi}{4} \quad \text{and} \quad x = \frac{7\pi}{4}
\]
These angles are within the interval \([0, 2\pi)\).
Final Answer
The solution set is:
\[
\boxed{\left\{ \frac{3\pi}{4}, \frac{7\pi}{4} \right\}}
\]