1. In ∆ABC, B = 90 A = 30,
AC = 14, then find
AB and BC.
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Answer:
BC=7,AB=7√3
Step-by-step explanation:
sin30=BC/AC
1/2=BC/14
BC=14/2
BC=7
cos30=AB/AC
√3/2=AB/14
AB=14√3/2
AB=7√3
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