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Dvinal [7]
3 years ago
10

Given: a = 640, A = 70°, B = 52° in triangle ABC ; find c . Round answers to the nearest whole number. Do not use a decimal poin

t or extra spaces in the answer or it will be marked incorrect.
Mathematics
1 answer:
telo118 [61]3 years ago
8 0
Law of sines:
\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\\=\frac{640}{\sin 70}=\frac{c}{\sin (180-70-52)}\\\text{ then}\\c=\frac{640}{\sin 70}\sin (180-70-52)\\=577 
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