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Buktikan bahwa: cos(a+b)+cos(a-b)=2 cos a cos b

Saluran Edukasi
Saluran Edukasion 2024-03-17T15:31:43
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Buktikan bahwa: cos(a+b)+cos(a-b)=2 cos a cos b
source: https://youtu.be/JxMli0v-8Uc

Buktikan bahwa: cos(a+b)+cos(a-b)=2 cos a cos b

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