1. Write - 1480 ° as 2K π + A, K ∈ Z, where 0 ≤ a < 2 π; 2. If β∈ [- 4 π, 0), and β is the same as the terminal edge of a in 1, find β

1. Write - 1480 ° as 2K π + A, K ∈ Z, where 0 ≤ a < 2 π; 2. If β∈ [- 4 π, 0), and β is the same as the terminal edge of a in 1, find β

1,-1480°=-10π+16π/9,(k=-5,a=16π/9),
Note: when it represents an angle, it cannot have both radian and angle. The unit should be unified
2,β=2kπ+16π/9,k∈Z
Because β ∈ [- 4 π, 0),
So when k = - 1, β = - 2 π / 9, or
When k = - 2, β = - 20 π / 9