Practice: The Angle between Two Planes and between a Plane and a Straight Line

Find, to the nearest second, the measure of the angle between the planes 9𝑥6𝑦+5𝑧=8 and 2𝑥+2𝑦+7𝑧=8.

  • A651129
  • B864851
  • C75659
  • D483137

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