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If A=[[costheta,sintheta],[-sintheta,cos...

If `A=[[costheta,sintheta],[-sintheta,costheta]]` then prove that
`A^2=[[cos2theta,sin2theta],[-sin2theta,cos2theta]]`

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BODY BOOKS PUBLICATION-MATRICES-EXERCISE
  1. Express the matrix [[2,-2,-4],[-1,3,4],[1,-2,-3]] as the sum of a ...

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  2. The value of k such that matrix [[1,k],[-k,1]] is symmetric if

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  3. If A=[[costheta,sintheta],[-sintheta,costheta]] then prove that A^2...

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  4. If A=[[1,3],[4,1]] , then find abs(3A^T)

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  5. If A=[[0,1],[0,0]] ,B=[[1,0],[0,0]], then BA=

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  6. Write A=[[3,5],[1,-1]] as the sum of a symmetric and a skew symmetric ...

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  7. Find the inverse of A=[[2,-6],[1,-2]]

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  8. Choose the correct statement related to the matrices A=[[1,0],[0,1]]...

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  9. IfM=[[7,5],[2,3]],then verify the equation M^2-10M+11I2=0

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  10. Consider the matrices A=[[1,-2],[-1,3]] and B=[[a,b],[c,d]] If AB=...

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  11. Let A=[(2,4),(1,-3)] and B=[(1,-1,5),(0,2,6)] Find AB.

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  12. Let A=[(2,4),(1,-3)] and B=[(1,-1,5),(0,2,6)]Is BA defined? Justify yo...

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  13. If A=[[3,1],[-1,2]] then Find A^2

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  14. If A=[[3,1],[-1,2]] then Hence show that A^2-5A+7I=0

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  15. If A is a square matrix such that A^2=A, then (I+A)^2-3A is equal to ...

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  16. Find A^2-5A+6I if A=[(2,5,8),(6,0,5),(0,-2,0)]

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  17. Consider the matrices A=[(2,1,3),(2,3,1),(1,1,1)] and B=[(-1,2,3),(-2,...

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  18. Consider the matrix A=[[2,1,3],[2,3,1],[1,1,1]] B=[[-1,2,3],[-2,3,1]...

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  19. Let A=[(0,2beta,gamma),(alpha,beta,-gamma),(alpha,-beta,gamma)] be 3xx...

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  20. Let A=[(0,2beta,gamma),(alpha,beta,-gamma),(alpha,-beta,gamma)] be 3xx...

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