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If vec a=x hat i+2 hat j-\ z hat k and ...

If ` vec a=x hat i+2 hat j-\ z hat k` and ` vec b=3 hat i-\ y hat j+ hat k` are two equal vectors, then write the value of `x+y+zdot`

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Let vec a= hat i+ hat j+ hat k , vec b= hat i- hat j+ hat ka n d vec c= hat i- hat j- hat k be three vectors. A vector vec v in the plane of vec a a n d vec b , whose projection on vec c is 1/(sqrt(3)) is given by a. hat i-3 hat j+3 hat k b. -3 hat i-3 hat j+3 hat k c. 3 hat i- hat j+3 hat k d. hat i+3 hat j-3 hat k

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
  1. If [(9,-1,4),(-2,1,3)]=A+[(1,2,-1),(0,4,9)], then find the matrix A.

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  2. If |(x+1,x-1),(x-3,x+2)|=|(4,-1),(1,3)|, then write the value of x .

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  3. If vec a=x hat i+2 hat j-\ z hat k and vec b=3 hat i-\ y hat j+ hat ...

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  4. Write the degree of the differential equation x^3((d^2y)/(dx^2))^2+x\ ...

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  5. Prove the following: tan^(-1)x+tan^(-1)((2x)/(1-x^2))=tan^(-1)((3x-x^3...

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  6. Find the value of a if [(a-b,2a+c),(2a-b,c+d)]=[(-1,5),(0,13)]

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  7. Prove the following: "cos"{tan^(-1){sin(cot^(-1)x)}}= sqrt((1+x^2)/(...

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  8. Find the Cartesian equation of the line which passes through the po...

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  9. If a unit vector vec a makes angles pi/3 with hat i ,pi/4 with hat ...

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  10. Find | vec x| , if for a unit vector vec a ,\ ( vec x- vec a)*( vec ...

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  11. Find the length of the perpendicular drawn from the origin to the pl...

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  12. Find the vector equation of the plane passing through three points w...

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  13. Write the principal value of tan^(-1)sqrt(3)-cot^(-1)(-sqrt(3)) .

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  14. Write the value of tan^(-1)[2sin(2cos^(-1)(sqrt(3)/2))] .

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  15. For what value of x is the matrix A=[(0,1,-2),(1,0,3),(x,3,0)] a skew-...

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  16. Using matrices, solve the following system of linear equations: x - ...

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  17. Write the differential equation representing the family of curves y...

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  18. If A(ij) is the cofactor of the element a(ij) of the determinant |(2,-...

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  19. P and Q are two points with position vectors 3 vec a-2 vec b and v...

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  20. Show that the differential equation 2y e^(x/y)\ dx+(y-2x e^(x/ y) ) dy...

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