Level:
Project ID:
2000005404
Accepted:
0
Clonable:
0
Easy:
1
Which of the following statements is true?
\( \sin 700^{\circ} = \sin 200^{\circ} \)
\( \cos 550^{\circ} = \cos 10^{\circ} \)
\( \mathrm{tg}\, 20^{\circ} = \mathrm{tg}\, (-20^{\circ}) \)
\( \cos 520^{\circ} = \cos 20^{\circ} \)