Mathematics · Complex Numbers
If x + 1x = -2 cos(θ), find the value of x2r + 1x2r.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 14 cos(2rθ)
- 2-4 cos(2rθ)
- 32 cos(2rθ)✓
- 4-2 cos(2rθ)
Correct answer
2 cos(2rθ)
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