10 / sin A = 12 / sin 45
10 / sin A = 24 / √2
sin A = 10√2 / 24
sin A = 5√2 / 12
buat segitiga siku siku kembali, dengan depan = 5√2 dan miring = 12
samping = √(144-50)
samping = √(94)
cos A = samping / miring
cos A = √94 / 12
semoga membantu :)
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10 / sin A = 12 / sin 45
10 / sin A = 24 / √2
sin A = 10√2 / 24
sin A = 5√2 / 12
buat segitiga siku siku kembali, dengan depan = 5√2 dan miring = 12
samping = √(144-50)
samping = √(94)
cos A = samping / miring
cos A = √94 / 12
semoga membantu :)