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The value of theta , lying between th...

The value of ` theta ` , lying between ` theta =0 and theta=(pi)/(2)` and satisfying the equation . `|{:(1+ cos^(2 ) theta , sin^(2) theta , 4 sin 4 theta ),(cos^(2) theta , 1+sin^2 theta , 4 sin 4 theta ),(cos^(2) theta , sin^(2) theta , 1+ 4 sin 4 theta ):}|=0 , is `

A

`pi//24, 5pi//24`

B

`7pi//24, 11pi//24`

C

`5pi//24, 7pi//24`

D

`11pi//24, pi//24`

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The correct Answer is:
B
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