If A = [(cos α,-sin α),(sin α,cos α)] and A + A' = I2, then α = (a) π(b) π/3(c) 3π/2(d) π/6

If A = [(cos α,-sin α),(sin α,cos α)] and A + A' = I2, then α =�

1.	If A = [(cos α,-sin α),(sin α,cos α)] and A + A' = I2, then α = (a) π(b) π/3(c) 3π/2(d) π/6
Answer» Answer is (b) π/3

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If A = [(cos α,-sin α),(sin α,cos α)] and A + A' = I2, then α = (a) π(b) π/3(c) 3π/2(d) π/6

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