Precalculus Archive: Questions from April 07, 2023
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3. Halle el valor exacto de las siguientes expresiones sin el uso de la calculadora. (a) \( \operatorname{sen}\left(\frac{\pi}{4}\right) \cos \left(\frac{19 \pi}{12}\right)+\cos \left(\frac{\pi}{4}\ri0 answers -
1. Halle los valores exactos usando las fórmulas de suma o resta (a) \( \tan \left(255^{\circ}\right) \) (b) \( \operatorname{sen}\left(\frac{17 \pi}{12}\right) \) (c) \( \cos \left(165^{\circ}\right2 answers -
2. Exprese como función trigonométrica de un ángulo (a) \( \operatorname{sen}\left(54^{\circ}\right) \operatorname{sen}\left(12^{\circ}\right)+\cos \left(54^{\circ}\right) \cos \left(12^{\circ}\rig2 answers -
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Graph the function. Identify amplitute, period, and phase shift. 1) \( y=\sin \pi x \) 2) \( y=\cos \left(x-\frac{\pi}{3}\right) \) 3) \( y=\frac{1}{2} \tan x \)2 answers