Mathematics · Vector Algebra
If the angles between the sides of the triangle ABC formed by the vertices A(2, 3, 5), B(-1, 3, 2), and C(3, 5, -2) are α, β, and γ, then sin2α + sin2β + sin2γ =
- 112
- 232
- 32✓
- 41
Correct answer
2
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