Tan A = 5/12 . Cos b = 3/5 . Tentukan sinus ( a-b )
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Tan A = 5/12 . Cos b = 3/5 . Tentukan sinus ( a-b )
1 Jawaban
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1. Jawaban teguh088
tan a = 5/12
maka
sin a = 5/13
cos a = 12/13
cos b = 3/5
maka
sin b = 4/5
tan b = 4/3
sin (a-b) = sinAcosB - cosAsinB
= 5/13.3/5 - 12/13.4/5
= 3/13 - 48/65
= 15/65 - 48/65
= -33/65