Question

Koordinat bayangan titik ( -2, 3 ) karena rotasi 60° dan dilanjutkan refleksi terhadap garis y=-x adalah

Answer 1

T1 = rotasi 60°--> T1 = |1/2.....-1/2√3||1/2√3...1/2|
T2 = y=-x --------> T2 = |0...-1||-1....0|

(x',y') = T2 oT1 |-2...3|
(x',y') = |-1/2√3...-1/2||-1/2...1/2√3|{-2...3}
(x'y') = |(√3 - 3/2), (1+3/2 √3)|

x' = √3  - 3/2
y' = 1  +  3/2 √3