Precalculus Archive: Questions from May 22, 2023
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3. Solve the system of equations. \[ \left\{\begin{array}{l} x-y+z=8 \\ x+y+z=6 \\ x+y-z=-12 \end{array}\right. \] a. \( x=-2, y=-1, z=-9 ;(-2,-1,-9) \) c. \( x=-2, y=-1, z=9 ;(-2,-1,9) \) b. \( x=2,2 answers -
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sin (+), cos(2), Find sin X 2 tan(x) = √2, 0° < x < 90° sin() = cos(-) = 2 tan() = and tan from the given information.
Find \( \sin \left(\frac{x}{2}\right), \cos \left(\frac{x}{2}\right) \), and \( \tan \left(\frac{x}{2}\right) \) from the given information. \[ \tan (x)=\sqrt{2}, \quad 0^{\circ}2 answers