Mathematics · Three Dimensional Geometry

Find the angle between the planes x + y + z = 1 and x - 2y + 3z = 1.

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1cos-1(1√42)
2cos-1(2√42)
3cos-1(2√42)✓
4cos-1(2√14)

Correct answer

cos-1(2√42)

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