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Kelas 10 MatematikaBab Trigonometri Dasar
Kata Kunci : Koordinat Kutub
x = r . cos a
x = 8√2 . cos 135°
x = 8√2 . (-1/2 √2)
x = -4 . 2
x = -8
y = r . sin a
y = 8√2 . sin 135°
y = 8√2 . 1/2 √2
y = 4 . 2
y = 8
(-8, 8)
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