Precalculus Archive: Questions from April 28, 2023
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1 answer
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\( \frac{\sin \alpha-\sin \beta}{\sin \alpha+\sin \beta}=\tan \frac{\alpha-\beta}{2} \cot \frac{\alpha+\beta}{2} \) identity.2 answers -
Eliminate the parameter. \[ \begin{array}{l} \left\{\begin{array}{l} x=(t+5)^{2} \\ y=3 t+8 \end{array}\right. \\ t \geq 0 \\ y=[?] \sqrt{x}+ \\ \end{array} \]2 answers -
9. Find lif possible) a. AB b. BA if \( \begin{aligned} A & =\left[\begin{array}{ccc}1 & -4 & 5 \\ 3 & -1 & 0 \\ 3 & 2 & -1\end{array}\right] \\ B & =\left[\begin{array}{ccc}0 & 1 & 2 \\ 3 & 3 & 0 \\2 answers -
1 answer
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1 answer
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2 answers
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2 answers