Question
Answer
$$sec\cdot(-1-2j)=-2cejs-ces$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}sec\cdot(-1-2j)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-ces-2cejs \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-2cejs-ces\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{ces} $ by $ \left( -1-2j\right) $ $$ \color{blue}{ces} \cdot \left( -1-2j\right) = -ces-2cejs $$ |
| ② | Combine like terms: $$ -2cejs-ces = -2cejs-ces $$ |
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