pettismayersjoy3le8 pettismayersjoy3le8

18-08-2019
Mathematics

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How you do number 4 pls help

How you do number 4 pls help class=

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BaileyOrion BaileyOrion

18-08-2019

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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