The - 1485 ° is expressed as 2K π + a (K ∈ Z, a ∈ [0,2 π))

The - 1485 ° is expressed as 2K π + a (K ∈ Z, a ∈ [0,2 π))

-Its terminal edge is the same as that of 315 ° in the fourth quadrant,
The radian of 315 ° is 7 π / 4,
So the answer is - 10 π + 7 π / 4