1 . A=2357

• A. $\left[\begin{array}{cc}44& -1\\ -31& 1\end{array}\right]$
• B. $\frac{1}{13}\left[\begin{array}{cc}44& -1\\ -31& 1\end{array}\right]$
• C. $\frac{1}{13}\left[\begin{array}{cc}-44& 1\\ 31& -1\end{array}\right]$
• D. $\frac{1}{13}\left[\begin{array}{cc}-31& 1\\ 44& -1\end{array}\right]$

Answer: Option B

Explanation:

2 . A=2357

• A. $\left[\begin{array}{cc}44& -1\\ -31& 1\end{array}\right]$
• B. $\frac{1}{13}\left[\begin{array}{cc}44& -1\\ -31& 1\end{array}\right]$
• C. $\frac{1}{13}\left[\begin{array}{cc}-44& 1\\ 31& -1\end{array}\right]$
• D. $\frac{1}{13}\left[\begin{array}{cc}-31& 1\\ 44& -1\end{array}\right]$

Answer: Option D

Explanation:

3 . sin A=23,cos A=?

• A. $\frac{3}{2}$
• B. $\frac{1}{3}$
• C. $\frac{\sqrt{5}}{3}$
• D. $\frac{1}{2}$

Answer: Option C

Explanation:

4 . a=23

• A. $-14/15$
• B. $-7/3$
• C. $-29$
• D. $-1$

Answer: Option C

Explanation: