If $A = [1 tan x - tan x 1]$ , show that $A^{T} A^{- 1} = [cos 2 x - sin 2 x sin 2 x cos 2 x]$ .

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A = [1 tan x - tan x 1]

, show that

A^{T} A^{- 1} = [cos 2 x - sin 2 x sin 2 x cos 2 x]

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Question Text

A = [1 tan x - tan x 1]

, show that

A^{T} A^{- 1} = [cos 2 x - sin 2 x sin 2 x cos 2 x]

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