선형 대수 예제

$[\begin{array}{c} 0 & \cos (x) & \sin (x) \\ 0 & - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \\ 0 & 3 \cos (x) + 4 \sin (x) & - 4 \cos (x) + 3 \sin (x) \end{array}]$

Step 1

Multiply every element in the $1 s t$ column by its cofactor and add.

$0 | \begin{array}{c} - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \\ 3 \cos (x) + 4 \sin (x) & - 4 \cos (x) + 3 \sin (x) \end{array} | + 0 | \begin{array}{c} \cos (x) & \sin (x) \\ 3 \cos (x) + 4 \sin (x) & - 4 \cos (x) + 3 \sin (x) \end{array} | + 0 | \begin{array}{c} \cos (x) & \sin (x) \\ - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \end{array} |$

Step 2

$0$ 에 $| \begin{array}{c} - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \\ 3 \cos (x) + 4 \sin (x) & - 4 \cos (x) + 3 \sin (x) \end{array} |$ 을 곱합니다.

$0 + 0 | \begin{array}{c} \cos (x) & \sin (x) \\ 3 \cos (x) + 4 \sin (x) & - 4 \cos (x) + 3 \sin (x) \end{array} | + 0 | \begin{array}{c} \cos (x) & \sin (x) \\ - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \end{array} |$

Step 3

$0$ 에 $| \begin{array}{c} \cos (x) & \sin (x) \\ 3 \cos (x) + 4 \sin (x) & - 4 \cos (x) + 3 \sin (x) \end{array} |$ 을 곱합니다.

$0 + 0 + 0 | \begin{array}{c} \cos (x) & \sin (x) \\ - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \end{array} |$

Step 4

$0$ 에 $| \begin{array}{c} \cos (x) & \sin (x) \\ - 2 \cos (x) - \sin (x) & \cos (x) - 2 \sin (x) \end{array} |$ 을 곱합니다.

$0 + 0 + 0$

Step 5

행렬식을 간단히 합니다.

자세한 풀이 단계를 보려면 여기를 누르십시오...

$0$ 를 $0$ 에 더합니다.

$0 + 0$

$0$ 를 $0$ 에 더합니다.

$0$