નીચેનાનું મૂલ્ય શોધો: $\left[ {\begin{array}{cc} {{\cos }^2}x & {{\sin }^2}x \\ {{\sin }^2}x & {{\cos }^2}x \end{array}} \right] + \left[ {\begin{array}{cc} {{\sin }^2}x & {{\cos }^2}x \\ {{\cos }^2}x & {{\sin }^2}x \end{array}} \right]$

• A
  $\left[\begin{array}{cc}1 & 1 \\ 1 & 1\end{array}\right]$
• B
  $\left[\begin{array}{cc}0 & 0 \\ 0 & 0\end{array}\right]$
• C
  $\left[\begin{array}{cc}1 & 0 \\ 0 & 1\end{array}\right]$
• D
  $\left[\begin{array}{cc}0 & 1 \\ 1 & 0\end{array}\right]$