DeterminantHard

Question

If I = , J = and B = , then B =

Options

A.Icosθ + Jsinθ
B.Icosθ - Jsinθ
C.Isinθ + Jcosθ
D.-  Icosθ + Jsinθ

Solution

I = ,  J =
I cosθ + J sinθ = =

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