sin a:5/3
cos a: 4/3
dikarenakan: √5^2-3^2 = 4/3
jadi : a•b = |4|.|6|.4/3
= 24 . 4/3
= 96/3
= 32
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sin a:5/3
cos a: 4/3
dikarenakan: √5^2-3^2 = 4/3
jadi : a•b = |4|.|6|.4/3
= 24 . 4/3
= 96/3
= 32