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Verified answer
Bab TrigonometriMatematika SMA Kelas X
sin 435° = sin (1 . 360° + 75°)
sin 435° = sin 75°
sin 435° = sin (45° + 30°)
sin 435° = sin 45° cos 30° + cos 45° sin 30°
sin 435° = 1/2 √2 . 1/2 √3 + 1/2 √2 . 1/2
sin 435° = 1/4 (√6 + √2)