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Verified answer
Bab TrigonometriMatematika SMA Kelas X
cos A = 2p
sin A = √(1 - cos² A)
= √(1 - (2p)²)
= √(1 - 4p²)
sin 2A = 2 . sin A . cos A
= 2 . √(1 - 4p²) . 2p
= 4p √(1 - 4p²)