Let 0 °≤ α≤ 2 π, then - 1485 ° be expressed as 2K π + α K in the form of Z

Let 0 °≤ α≤ 2 π, then - 1485 ° be expressed as 2K π + α K in the form of Z

2 π = 360 °, - 1485 °,
2K π = 1800 degree, - 1485 degree = - 10 π + α, α = 320 degree, α = 16 / 9, π = 315 degree

Let K + be expressed in the form of K ∈α - 2, and K ∈α - 85
This question is not an answer! What is the teacher's intention~

-1485°=-5*360°+315°
360°=2π
315°=315/180*π=7π/4
So it's - 5 × 2 π + 7 π / 4
The teacher's intention is to master trigonometric function

Let 0 ≤ α ≤ 2 clique, denote - 1485 ° as 2K clique + α, K ∈ Z is?

-1485 ° can be expressed as - 10 π + 7 π / 4