If f(θ) = [cosθ sinθ; -sinθ cosθ], then what is {f(π)}² equal to?

1. A.[-1 0; 0 -1]
2. B.[1 1; 1 1]
3. C.[-1 0; 0 1]
4. D.[1 0; 0 1]✓ Correct

More Matrices questions

• → If A = [1 2 2; 2 1 2; 2 2 1], then what is A² - 4A equal to? (where I₃ is the identity matrix of order 3)
• → If Mᵀ is the transpose of 2×2 matrix M, then which of the following is/are correct? I. |M + Mᵀ| = |M| + |Mᵀ| i…
• → If [x 1 1] [1 2 3; 4 5 6; 7 8 9] [1; 1; x] = [45], then which one of the following is a value of x?