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A value of for which is
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a
7π36
b
7π24
c
π18
d
π9
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Correct option is D
We have R2→R2-R1, R3→R3-R2⇒1+cos2θsin2θ4cos6θ-110-101=0⇒1+cos2θ·1-sin2θ(-1)+4cos6θ=0⇒2+4cos6θ=0⇒cos6θ=-12⇒6θ=2π3,4π3⇒θ=π9,2π9Similar Questions
If [ ] denotes the greatest integer less than or equal to the real number under consideration, and ,, then the value of the determinant is
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