Giải phương trình lượng giác \(2\cos \left( {x - \dfrac{\pi }{3}} \right) = 1\).
A.\(x \in \left\{ {\dfrac{{2\pi }}{3} + k2\pi ;\,\,k2\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
B.\(x \in \left\{ {\dfrac{{\pi }}{3} + k2\pi ;\,\,k2\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
C.\(x \in \left\{ {\dfrac{{\pi }}{3} + k\pi ;\,\,k\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
D.\(x \in \left\{ {\dfrac{{2\pi }}{3} + k\pi ;\,\,k\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
A.\(x \in \left\{ {\dfrac{{2\pi }}{3} + k2\pi ;\,\,k2\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
B.\(x \in \left\{ {\dfrac{{\pi }}{3} + k2\pi ;\,\,k2\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
C.\(x \in \left\{ {\dfrac{{\pi }}{3} + k\pi ;\,\,k\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
D.\(x \in \left\{ {\dfrac{{2\pi }}{3} + k\pi ;\,\,k\pi \,\,\left( {k \in \mathbb{Z}} \right)} \right\}\)
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Hóa Học lớp 12
