Nomor 5 dan 6 Dong Manteman

5) A ( -5, 5) => ( r, A )
r = √(-5^2 + 5^2)
r = √(25 +25)
r = √50 = 5√2
tan A = -5/5
tan A = -1
tan A = tan 135
(-5,5) => polar = ( 5√2, 135° )
B = ( 4√3, 4)
r = √{ (4√3)^2 + 4^2)
r = √(48+ 16)
r = √64
r = 8
tan B = 4√3/4
tan B = √3
tan B = tan 60°
B ( 4√3, 4) => polar = ( 8, 60°)
6) Sumatera => 5° LU - 5° LS dan 96°BT - 106°BT
Sulawesi => 2,6°LU - 6°LS dan 118°BT-123°BT
Bali => 8°LS - 9°LS dan 117°BT- 119°BT
Papua => 2,4°LU-9°LS dan 131°BT-141°BT.