If Neft - beginmatrix -2 1 1 2 -

The correct option is A ±√(7) |A^3|=(α^2 4)^3=27⇒α ^2 4=3 α =±√(7) ...

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Scalar Multiplication of a Matrix

If Neft [ beg...

Question

If $[\begin{matrix} α & 2 2 & α \end{matrix}]$ and $| A^{3} | = 27$ , then $α$ ....

$\pm 1$

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$\pm 2$

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$\pm \sqrt{7}$

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$\pm \sqrt{5}$

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If $A = [\begin{matrix} c o s α & s i n α - s i n α & c o s α \end{matrix}]$ , then $A^{2} =$

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A^{2} =

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\tan^{- 1} (\frac{\sqrt{1 + x^{2}} - \sqrt{1 - x^{2}}}{\sqrt{1 + x^{2}} + \sqrt{1 - x^{2}}})

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