1 votes 1 votes $Prove\ that,\ sin^2A+cos^2A=1,\ where \ A=\begin{bmatrix} 1&2 \\ -1&4 \end{bmatrix}.$ Linear Algebra eigen-value + – Debargha Mitra Roy asked Jan 10 Debargha Mitra Roy 68 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.