Algebra Archive: Questions from February 12, 2023
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Find the value of the expression \( \sin 6 Z^{\circ} \cdot \sin 3 Z^{\circ}+\sin 28^{\circ}-\sin 58^{\circ} \). A) \( \frac{\sqrt{2}}{2} \) B) \( \frac{1}{2} \) C) 1 D) \( -\frac{\sqrt{2}}{2} \) E) \(2 answers -
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\( \begin{array}{l}x-y+z=w=1 \\ y+2 z+w=4 \\ -z+w=2 \\ -x+2 y-3 z+5 w=4 \\ x=\quad y=\quad z=, w= \\\end{array} \)2 answers -
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\[ f(x, y)=\frac{x}{y}, P(8,1), u=\frac{3}{5} i+\frac{4}{5} j \] find the gradient of \( f \) \[ \nabla f(x, y) \]2 answers -
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