QUESTION IMAGE
Question
8a )
what is the range of the function y = 2 sin x?
choice
a. -2,2
b 2π
c π
d all real numbers
Step1: Recordar el rango de la función \(y = \sin x\)
El rango de \(y=\sin x\) es \([- 1,1]\), es decir \(-1\leqslant\sin x\leqslant1\).
Step2: Multiplicar por 2
Multiplicamos la desigualdad por 2: \(2\times(-1)\leqslant2\sin x\leqslant2\times1\).
$$-2\leqslant2\sin x\leqslant2$$
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A. \([-2,2]\)