billy18 billy18

12-07-2016
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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12-07-2016

Hello,

if sin x=-1 then x=270°+k*360
if k=- 1 then x=-90°
if k=0 then x=270°

Answer C

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