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If A,B,C are the angles of triangle ABC,...

If A,B,C are the angles of triangle ABC, then the minimum value of `|{:(-1,cos C , cos B),(cos C , -1, cos A ) , (cos B , cos A , -1):}|` is equal to :

A

`cos A cos B cos C`

B

`sin A sin B sin C`

C

0

D

none of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-DETERMINANTS-Exercise
  1. a^(−1)+b^(−1)+c^(−1)=0 such that |[1+a,1,1,],[1,1+b,1,],[1,1,1+c,]| =△...

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  2. If alpha,beta,gamma are real numbers, then without expanding at any...

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  3. If A,B,C are the angles of triangle ABC, then the minimum value of |{:...

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  4. If x, y , z are in A.P., then the value of the det (A) is , where A ...

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  5. Find the number of real root of the equation |0x-a x-b x+a0x-c x+b x+c...

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  6. If a , b , c are distinct, then the value of x satisfying |0x^2-a x^3-...

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  7. Let the following system of equations {:(kx+y+z=1),(x+ky+z=k),(x+y+k...

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  8. Show that: |b^2+c^2a b a c b a c^2+a^2b c c a c b a^2+b^2|=4a^2b^2c^2

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  9. Let triangle =|[2a1b1, a1b2+a2b1, a1b3+a3b1], [a1b2+a2b1, 2a2b2, a2b3+...

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  10. If B is a non-sinfular matrix and A is square matrix, then det B^(-1)A...

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  11. If 0 lt theta lt pi and the system of equations (sin theta) x + y + ...

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  12. If the determinant |(b -c,c -a,a -b),(b' -c',c' -a',a' -b'),(b'' -c'',...

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  13. If a !=b, then the system of equation ax + by + bz = 0 bx + ay + bz ...

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  14. if |{:(1,,1,,1),(a,,b,,c),(a^(3),,b^(3),,c^(3)):}|= (a-b)(b-c)(c-a)(a+...

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  15. Show that a x+b y+r=0,b y+c z+p=0a n dc z+a x+q=0 are perpendicular to...

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  16. Consider the function f(x) = |{:(a^(2)+x,,ab,,ac),(ab,,b^(2)+x,,bc),(a...

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  17. The equation |(x-a,x-b,x-c),(x-b,x-a,x-c),(x-c,x-b,x-a)|=0 (a,b,c are ...

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  18. Let A = [(1,sin theta,1),(- sin theta,1,sin theta),(-1,-sin theta,1)],...

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  19. If a,b,c are non-zero real number such that |(bc,ca,ab),(ca,ab,bc),(ab...

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  20. The value of the determinant |{:(ka,,k^(2)+a^(2),,1),(kb,,k^(2)+b^(2)...

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