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If A = [ (cos alpha ,- sin alpha ),(sin ...

If `A = [ (cos alpha ,- sin alpha ),(sin alpha ,cos alpha)]`, then A + A' = I then the value of ` alpha ` is :

A

`pi/6`

B

`pi/3`

C

`pi`

D

`(3pi)/2`

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XII BOARDS PREVIOUS YEAR-QUESTION PAPER 2022 TERM 1 SET 2-SECTION B
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  3. The function f : N to N is defined by f(n)={((n+1)/2" , if n is odd"),...

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  7. The determinant |{:(y+k ," " y , " "y),(y , y+k," " y),(y , " "y , y+k...

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  8. If A = [{:(1,-2, 4),(2,-1, 3),(4,2,0):}] is the adjoint of a square ma...

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  9. If A = [{:(1,-1,1),(1,-1,1),(1,-1,1):}] , then A^5 -A^4 -A^3 +A^2 is e...

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  10. If y = e^(-x) , then (d^2y)/(dx^2) is equal to :

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  11. If x = t^2 + 1 , y = 2"at" then (d^2 y)/(dx^2) at t = a is :

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  12. The function f(x) {{:(x^2 , "for " , x lt 1 ),(2-x,"for",x ge 1):} is

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  16. If theta is the angle of intersection between the curves y^(2)=4ax and...

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  17. The maximum value of z =3x+4y subject to the constraints x ge 0 , y g...

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  18. The feasible region of an LPP is given in the following figure : ...

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  19. If the minimum value of an objective function Z = ax + by occurs at t...

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