Mathematics · Matrices and Determinants
If matrix A = 13 [ 1 2 2 ; 2 1 -2 ; a 2 b ] is an orthogonal matrix, then the values of a and b are respectively:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1a = -2, b = 1
- 2a = 2, b = -1
- 3a = 2, b = 1
- 4a = -2, b = -1✓
Correct answer
a = -2, b = -1
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