One of the values of x for which ...

CBSE Class 12 Math 2026 All Sets Solved Paper

Question : 5 of 20

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One of the values of x for which

{|\table \cos x , \sin x ; -\cos x , \sin x|}=1

Solution:

{|\table \cos x , \sin x ; -\cos x , \sin x|}=1

⇒ \cos x \sin x+\cos x \sin x=1

⇒ 2 \cos x \sin x=1

⇒ \sin 2 x=1

⇒ 2 x=\;{π}/{2}

⇒ x=\;{π}/{4}

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