CBSE Class 12 Mathematics 2026 Main Paper 65(B) · Q31 Markstranspose
CBSE Class 12 Mathematics 2026 Main Paper 65(B) · Question 3 (Matrices)
For A=[[cos 2α,−sin 2α],[sin 2α,cos 2α]], which listed α makes A+Aᵀ=I?
✅ Step-by-Step Solution
Final Answer: π/6
- The sum is 2 cos(2α)I. The listed solution to cos(2α)=1/2 is π/6.
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