第11章 11.7

(1)

$412° = 52° + 360°$

(2)

$900° = 180° + 360° \times 2$

(3)

$2130° = 330° + 360 \times 5$

(4)

$-240° = 120° + 360° \times (-1)$

(5)

$-860° = 220° + 360° \times (-3)$

(6)

$-450 = 270° + 360° \times (-2)$