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theta in [0,2pi] and z(1), z(2), z(3) ar...

` theta in [0,2pi]` and `z_(1)`, `z_(2)`, `z_(3)` are three complex numbers such that they are collinear and `(1+|sin theta|)z_(1)+(|cos theta|-1)z_(2)-sqrt(2)z_(3)=0`. If at least one of the complex numbers `z_(1)`, `z_(2)`, `z_(3)` is nonzero, then number of possible values of `theta` is

A

Infinite

B

`4`

C

`2`

D

`8`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given problem, we need to analyze the equation provided and determine the possible values of \( \theta \) based on the conditions given. ### Step-by-Step Solution: 1. **Understanding the Condition of Collinearity**: The complex numbers \( z_1, z_2, z_3 \) are collinear if there exist scalars \( a, b, c \) such that: \[ a z_1 + b z_2 + c z_3 = 0 \] In our case, we have: \[ (1 + |\sin \theta|) z_1 + (|\cos \theta| - 1) z_2 - \sqrt{2} z_3 = 0 \] This implies that the coefficients must satisfy: \[ 1 + |\sin \theta| + (|\cos \theta| - 1) - \sqrt{2} = 0 \] 2. **Simplifying the Equation**: Rearranging the equation gives us: \[ |\sin \theta| + |\cos \theta| - \sqrt{2} = 0 \] This can be rewritten as: \[ |\sin \theta| + |\cos \theta| = \sqrt{2} \] 3. **Analyzing the Equation**: The maximum value of \( |\sin \theta| + |\cos \theta| \) occurs when both sine and cosine are equal, which happens at \( \theta = \frac{\pi}{4} + n\frac{\pi}{2} \) for \( n \in \mathbb{Z} \). The maximum value is: \[ |\sin \theta| + |\cos \theta| = \sqrt{2} \] 4. **Finding the Specific Angles**: The angles where \( |\sin \theta| + |\cos \theta| = \sqrt{2} \) are: - \( \theta = \frac{\pi}{4} \) - \( \theta = \frac{3\pi}{4} \) - \( \theta = \frac{5\pi}{4} \) - \( \theta = \frac{7\pi}{4} \) 5. **Conclusion**: Therefore, the possible values of \( \theta \) in the interval \( [0, 2\pi] \) are: \[ \frac{\pi}{4}, \frac{3\pi}{4}, \frac{5\pi}{4}, \frac{7\pi}{4} \] This gives us a total of 4 possible values for \( \theta \). ### Final Answer: The number of possible values of \( \theta \) is **4**.

To solve the given problem, we need to analyze the equation provided and determine the possible values of \( \theta \) based on the conditions given. ### Step-by-Step Solution: 1. **Understanding the Condition of Collinearity**: The complex numbers \( z_1, z_2, z_3 \) are collinear if there exist scalars \( a, b, c \) such that: \[ a z_1 + b z_2 + c z_3 = 0 ...
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