Trắc nghiệm Một số phương trình lượng giác thường gặp có đáp án (Nhận biết)

A. $\left(\begin{array}{c}x=\frac{k\pi }{2}\\ x=\pm \frac{1}{2}arccos(-\frac{1}{6})+k\pi \end{array}\right)(k\in Z)$

B. $\left(\begin{array}{c}x=\frac{k\pi }{2}\\ x=\pm \frac{5}{2}arccos(-\frac{1}{6})+k\pi \end{array}\right)(k\in Z)$

C. $\left(\begin{array}{c}x=\frac{k\pi }{2}\\ x=\pm \frac{1}{2}arccos(-\frac{1}{3})+k\pi \end{array}\right)(k\in Z)$

D. $\left(\begin{array}{c}x=\frac{k\pi }{2}\\ x=\pm \frac{1}{3}arccos(-\frac{1}{6})+k\pi \end{array}\right)(k\in Z)$

A. $x=\frac{\pi }{4}+k\pi \left(k\in Z\right)$

B. $x=\frac{\pi }{4}+\frac{k\pi }{2}\left(k\in Z\right)$

C. $x=\frac{3\pi }{4}+2k\pi \left(k\in Z\right)$

D. $x=\frac{3\pi }{4}+k\pi \left(k\in Z\right)$

A. $x=\pi +k2\pi ,x=\frac{\pi }{4}+k\pi$

B. $x=\pi +k2\pi ,x=-\frac{\pi }{4}+k2\pi$

C. $x=\pi +k2\pi ,x=\frac{\pi }{4}+k2\pi$

D. $x=\pi +k2\pi ,x=-\frac{\pi }{4}+k\pi$

A. $x=\pm \frac{\pi }{6}+k\pi$

B. $x=\pm \frac{\pi }{6}+k2\pi$

C. $x=\pm \frac{\pi }{3}+k\pi$

D. $x=\pm \frac{\pi }{3}+k2\pi$

A. $\left(\begin{array}{c}x=\frac{\pi }{3}+k\pi \\ x=\frac{\pi }{6}+k\pi \end{array}\right)$

B. $\left(\begin{array}{c}x=\frac{\pi }{3}+k2\pi \\ x=\frac{\pi }{6}+k2\pi \end{array}\right)$

C. $\left(\begin{array}{c}x=-\frac{\pi }{3}+k\pi \\ x=-\frac{\pi }{6}+k\pi \end{array}\right)$

D. $\left(\begin{array}{c}x=-\frac{\pi }{3}+k2\pi \\ x=\frac{\pi }{6}+k\pi \end{array}\right)$

A. 0

B. 1

C. 2

D. 4

A. $x=\frac{\pi }{3}$

B. $x=\frac{\pi }{2}$

C. $x=\frac{\pi }{6}$

D. $x=\frac{5\pi }{6}$

A. m = 1

B. Không có m

C. m = 0

D. Với mọi m

A. $-\frac{5{\pi }^2}{12}$

B. $-\frac{5{\pi }^2}{144}$

C. $\frac{5{\pi }^2}{144}$

D. $\frac{{\pi }^2}{12}$

A. $\left(\begin{array}{c}x=k\pi \\ x=\frac{\pi }{2}+k\pi \end{array}\right)(k\in Z)$

B. $\left(\begin{array}{c}x=k\pi \\ x=-\frac{\pi }{3}+k\pi \end{array}\right)(k\in Z)$

C. $x=k\pi \left(k\in \mathbb{Z}\right)$

D. $\left(\begin{array}{c}x=k2\pi \\ x=-\frac{\pi }{3}+k2\pi \end{array}\right)(k\in Z)$

A. Ba nghiệm

B. Một nghiệm

C. Hai nghiệm

D. Bốn nghiệm

A. 0

B. 1

C. 2

D. 3

A. $x=\frac{k\pi }{18};x=\frac{k\pi }{22}\left(k\in Z\right)$

B. $x=\frac{k\pi }{9};x=\frac{\pi }{44}+\frac{k\pi }{22}\left(k\in Z\right)$

C. $x=\frac{\pi }{3}+\frac{k\pi }{18};x=\frac{\pi }{22}+\frac{k\pi }{22}\left(k\in Z\right)$

D. $x=\frac{k\pi }{3};x=\frac{\pi }{44}+\frac{k\pi }{44}\left(k\in Z\right)$

A. $x=k\pi ,x=\frac{\pi }{3}+\frac{k2\pi }{3}$

B. $x=\pm \frac{\pi }{3}+\frac{k2\pi }{3}$

C. $x=\frac{\pi }{2}+k\pi ,x=-\frac{\pi }{3}+\frac{k2\pi }{3}$

D. $x=2k\pi ,x=\frac{\pi }{2}+\frac{2\pi }{3}$

A. $x=\frac{2k\pi }{3}\left(k\in Z\right)$

B. $x=\frac{2k\pi }{3},x=\frac{k\pi }{9}\left(k\in Z\right)$

C. $x=\frac{k\pi }{20}\left(k\in Z\right)$

D. $x=\frac{k\pi }{6},x=\frac{k\pi }{20}\left(k\in Z\right)$