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Buktikanlah! cos(a+b)=44/125 jika sin a=4/5 (alpha sudut

Saluranedukasi
Saluranedukasion 2023-12-06T17:07:00.000Z
Buktikanlah! cos(a+b)=44/125 jika sin a=4/5 (alpha sudut
source: https://youtu.be/pHwQTmQw4ZE

Buktikanlah! cos(a+b)=44/125 jika sin a=4/5 (alpha sudut lancip) sin b=7/25 (beta sudut lancip)

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