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

Saluranedukasion 2024-04-08T18:42:00

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