Đề giữa kỳ 1 Toán 11 năm 2024 – 2025 trường chuyên Lê Khiết – Quảng Ngãi

$\tan\alpha > 0$.

$\cot\alpha > 0$.

$\cos\alpha > 0$.

$\sin\alpha > 0$.

$x = k2\pi,, k \in {\mathbb{Z}}$.

$x = \dfrac{\pi}{2} + k2\pi,, k \in {\mathbb{Z}}$.

$x = k\pi,, k \in {\mathbb{Z}}$.

$x = \dfrac{\pi}{2} + k\pi,, k \in {\mathbb{Z}}$.

$- 40^{{^\circ}}$.

$- 140^{{^\circ}}$.

$40^{{^\circ}}$.

$140^{{^\circ}}$.

$y = \cot x$.

$y = \cos x$.

$y = \sin x$.

$y = \tan x$.

$13$.

$8$.

$17$.

$16$.

$\left\lbrack {0;5} \right)$.

$\left\lbrack {15;20} \right)$.

$\left\lbrack {5;10} \right)$.

$\left\lbrack {10;15} \right)$.

$\sin a + \sin b = - 2\sin\dfrac{a + b}{2}\sin\dfrac{a - b}{2}$.

$\sin a + \sin b = 2\sin\dfrac{a + b}{2}\cos\dfrac{a - b}{2}$.

$\sin a + \sin b = 2\cos\dfrac{a + b}{2}\cos\dfrac{a - b}{2}$.

$\sin a + \sin b = 2\cos\dfrac{a + b}{2}\sin\dfrac{a - b}{2}$.

$8,15,22,29,36.$

$\dfrac{1}{3};,\dfrac{1}{3^{2}};,\dfrac{1}{3^{3}};,\dfrac{1}{3^{4}};,\dfrac{1}{3^{5}};,...$.

$2;, 0;, 4;, 6;, 8;,...$.

$5;10;15;20;25...$.

$x = \alpha^{{^\circ}} + k360^{{^\circ}},, k \in {\mathbb{Z}}$.

$x = \alpha^{{^\circ}} + k180^{{^\circ}},, k \in {\mathbb{Z}}$.

$x = \pm \alpha^{{^\circ}} + k180^{{^\circ}},, k \in {\mathbb{Z}}$.

$x = \pm \alpha^{{^\circ}} + k360^{{^\circ}},, k \in {\mathbb{Z}}$.

$S_{n} = \dfrac{u_{1}\left( {1 - q} \right)^{n}}{1 - q}$.

$S_{n} = \dfrac{u_{1}\left( {1 - q^{n}} \right)}{1 - q}$.

$S_{n} = \dfrac{u_{1}\left( {1 - q^{n}} \right)}{q - 1}$.

$S_{n} = \dfrac{\left( {1 - q^{n}} \right)}{1 - q}$.

$1;, 3;, 5;, 7;, 9;,...$.

$1; - \dfrac{1}{2};\ \dfrac{1}{4}; - \dfrac{1}{8};\ \dfrac{1}{16};,...$

$2;, 2;, 2;, 2;, 2;,...$.

$1;\ \dfrac{1}{2};\ \dfrac{1}{4};\ \dfrac{1}{8};\ \dfrac{1}{16};,...$