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Laieeqa

Subject: Maths, asked on 22/2/18

Solve this:
Q. By using elementary transformations, find the inverse of the matrix $[\begin{matrix} 0 & 1 & 2 \\ 1 & 2 & 3 \\ 2 & 1 & 1 \end{matrix}]$

Sudipan

Subject: Maths, asked on 21/2/18

Solve for x,y,z

Aashish Rohilla

Subject: Maths, asked on 20/2/18

Solve this:
Q. Using properties of determinant prove that

$|\begin{matrix} \cos α \cos β & \cos α \sin β & - \sin α \\ - \sin β & \cos β & 0 \\ \sin α \cos β & \sin α \sin β & \cos α \end{matrix}| = 1$

Afrah Baber Khan

Subject: Maths, asked on 19/2/18

If A square matrix of order 3 and I3AI = kIAI. Find the value of k.

Riya

Subject: Maths, asked on 17/2/18

$Q . E v a l u a t e : \sin (2 \cos^{- 1} (- 3 / 5)) Q . W h a t i s t h e p r i n c i p a l v a l u e o f \tan^{- 1} [\tan 2 π / 3] ? Q . W r i t e t h e v a l u e o f \tan^{- 1} (a / b) - \tan - 1 [(a - b) / (a + b)] Q . W r i t e t h e v a l u e o f \cos^{- 1} (- 1 / 2) + 2 \sin^{- 1} (1 / 2) Q . W r i t e t h e p r i n c i p a l v a l u e o f \tan^{- 1} (- 1) ? Q . E v a l u a t e : S i n [π / 2 - \sin^{- 1} (- 1 / 2)] Q . W r i t e t h e v a l u e o f \cos^{- 1} [\cos (7 π / 6)] Q . S t a t e t h e r e a s o n f o r t h e f o l l o w i n g B i n a r y O p e r a t i o n , d e f i n e d o n t h e s e t Z o f i n t e g e r s, t o b e n o t c o m m u t a t i v e . a b = a b^{3} . Q . G i v e a n e x a m p l e o f a s k e w s y m m e t r i c m a t r i x o f o r d e r 3 .$

Nithyashrri Saravanan

Subject: Maths, asked on 8/2/18

Q. Find AB if $A = [\begin{matrix} ω & ω \\ 1 & ω^{2} \end{matrix}]$ and $B = [\begin{matrix} 1 & ω^{2} \\ ω & ω^{2} \end{matrix}]$

Chaitanya Kapoor

Subject: Maths, asked on 3/2/18

If $A = (\begin{matrix} 1 & 0 & 2 \\ 0 & 2 & 1 \\ 2 & 0 & 3 \end{matrix}) and A^{3} - 6 A^{2} + 7 A + k l_{3} = O find k .$

Shreya Dey

Subject: Maths, asked on 3/2/18

using the properties of determinants prove that| a b-c c+b|
|a+c b c-a|
| a-b b+a c| = (a+b+c)(a²+b²+c²)

B Ashwini

Subject: Maths, asked on 23/1/18

If $(2 1 3) (\begin{matrix} - 1 & 0 & - 1 \\ - 1 & 1 & 0 \\ 0 & 1 & 1 \end{matrix}) (\begin{matrix} 1 \\ 0 \\ - 1 \end{matrix}) = A$ , then write the order of matrix A.

Abhiram Sankar

Subject: Maths, asked on 17/1/18

If A = [a_ij] is a matrix of order 2x2, such that lAl = -15 and c_ij represents the cofactor of aij, then find a₂₁.c₂₁ + a₂₂.c₂₂
[NO LINKS PLEASE]

Akansha Karvekar

Subject: Maths, asked on 16/1/18

How to find antilog of negative number

Tithi

Subject: Maths, asked on 16/1/18

No links. Please solve it.

Q. Symmetric.

If |A| = 5, find | A^T (adj A) where A is a square matrix of order 3.

Shubhrajyoti Ghosh

Subject: Maths, asked on 15/1/18

$Q . W a h t i s t h e v a l u e o f \cos [\cos^{- 1} (- \frac{1}{7}) + \sin^{- 1} (- \frac{1}{7})] ?$

Sandra Saju

Subject: Maths, asked on 11/1/18

P?zz answer this question

Q. If p||q then x is :

Snegaa J. S.

Subject: Maths, asked on 9/1/18

Find the matrix A such that

$[\begin{matrix} 2 & - 1 \\ 1 & 0 \\ - 3 & 4 \end{matrix}] A = [\begin{matrix} - 1 & - 8 & - 10 \\ - 1 & - 2 & - 5 \\ 9 & 22 & 15 \end{matrix}]$

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