joannak8192 joannak8192
  • 08-03-2024
  • Mathematics
contestada

If a line makes an angle θ₁, θ₂, θ₃ which the axis respectively, then cos2θ₁ + cos2θ₂ + cos2θ₃ = ?

A. −4
B. 2
C. 3
D. −1

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