Q97
For \[ A = [ array*20c 1& \, x \\ - x&1 array ],\] the determinant of ATA-1 is
For {\text{A}} = \left[ {\begin{array}{*{20}{c}}
1&{\tan \,{\text{x}}} \\
{ - \tan {\text{ x}}}&1
\end{array}} \right], the determinant of ATA-1 is
A.
sec2x
B.
cos4x
C.
1
AnswerD.
0
Answer: Option C
Solution
Answer: Option C
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