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3 years ago

8

How you do number 4 pls help

1 answer:

Artyom0805 [142]3 years ago

7 0

I haven't got a calculator right now but substitute the values into the cosine law so:

8² = 5² + c² - (2 x 5 x c x cos58)

and then use sine law to find B

sin58/8 = sinB/5

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