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Tunjukkan bahwa: cos(alpha + beta) + cos (alpha - beta) = 2

Saluran Edukasi
Saluran Edukasion 2024-06-17T20:52:00
Tunjukkan bahwa: cos(alpha + beta) + cos (alpha - beta) = 2
source: https://youtu.be/zAfUPBY5hcs

Tunjukkan bahwa: cos(alpha + beta) + cos (alpha - beta) = 2 cos alpha cos beta

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