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Buktikan bahwa: cos(2a)=(1-tan^2(a))/(1+tan^2(a))

Saluranedukasi
Saluranedukasion 2024-04-08T18:42:00
Buktikan bahwa: cos(2a)=(1-tan^2(a))/(1+tan^2(a))
source: https://youtu.be/l8RDXssAwRU

Buktikan bahwa: cos(2a)=(1-tan^2(a))/(1+tan^2(a))

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