PENJELASAN
x' = y
y' = -x
Maka :
= -4
= 3
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PENJELASAN
x' = y
y' = -x
Maka :
x' = y
= -4
y' = -x
= 3
JADI, bayangan titik K(-3,-4) setelah diputar sebesar 90 derajat searah jarum jam adalah (3, -4).