theman4 theman4

14-07-2016
Mathematics

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Can someone please answer. There is one problem. There's a picture. Thank you!

Can someone please answer There is one problem Theres a picture Thank you class=

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lzyscript lzyscript

14-07-2016

bc =x
sinB = 13/x
cosB = 17/x
∵ sinB²+cosB²=1
∴ x≈21
∵ 17/21 = sinC
∴C≈60

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