Buktikan bahwa cos a=(1-tan^2 1/2 a)/(1+tan^2 1/2 a )
Saluranedukasion 2024-05-19T07:31:43
Buktikan bahwa cos a=(1-tan^2 1/2 a)/(1+tan^2 1/2 a )
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Buktikan bahwa cos a=(1-tan^2 1/2 a)/(1+tan^2 1/2 a )