Trắc nghiệm Toán 10 Bài 3 Công thức lượng giác

A. 2

B. 1

C. 4

D. 3

A. 3/10

B. 2/9

C. 1/4

D. 1/6

A. \(\frac{{17\sqrt 5 }}{{27}}\)

B. \( - \frac{{\sqrt 5 }}{9}\)

C. \(\frac{{\sqrt 5 }}{{27}}\)

D. \( - \frac{{\sqrt 5 }}{{27}}\)

A. \(\frac{\pi }{6}\)

B. \(\frac{\pi }{3}\)

C. \(\frac{\pi }{4}\)

D. \(\frac{\pi }{8}\)

A. \(\frac{{3\sqrt {10} }}{8}\)

B. \(\frac{{5\sqrt 6 }}{{16}}\)

C. \(\frac{{3\sqrt {10} }}{{16}}\)

D. \(\frac{{5\sqrt 6 }}{8}\)

A. -2

B. 14

C. 2

D. 34

A. cosx+ cos(x+\(\frac{{2\pi }}{3}\))+ cos(x+\(\frac{{4\pi }}{3}\))

B. sinx + sin(x+\(\frac{{2\pi }}{3}\)) + sin(x+\(\frac{{4\pi }}{3}\))

C. cos²x + cos²(x+\(\frac{{2\pi }}{3}\)) + cos²(x+\(\frac{{4\pi }}{3}\))

D. sin²x+sin²(x+\(\frac{{2\pi }}{3}\)) + sin²(x+\(\frac{{4\pi }}{3}\))

A. \(\frac{1}{3}\)

B. \(\frac{9}{7}\)

C. 1

D. \(\frac{7}{9}\)

A. \(2\sqrt 6 \)

B. \(\frac{{\sqrt 6 }}{4}\)

C. \(\sqrt 6 \)

D. \(\frac{{\sqrt 6 }}{2}\)

A. \(\frac{{12 - 5\sqrt 3 }}{{26}}\)

B. \(\frac{{12 + 5\sqrt 3 }}{{26}}\)

C. \(\frac{{ - 5 + 12\sqrt 3 }}{{26}}\)

D. \(\frac{{5 - 12\sqrt 3 }}{{26}}\)

A. 1

B. -1/2

C. 1/2

D. 1/3

A. \(\frac{{\sqrt 2 }}{{16}}\)

B. \(\frac{{\sqrt 2 }}{4}\)

C. \(\frac{{\sqrt 2 }}{2}\)

D. \(\frac{{\sqrt 2 }}{8}\)