Seudónimo Seudónimo
  • 21-03-2018
  • Mathematics
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I just need help with #21. I don’t know to figure it out. Please help. Thanks. :)

I just need help with 21 I dont know to figure it out Please help Thanks class=

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Аноним Аноним
  • 21-03-2018
1 and 3 are  angles of  depression
2 and 4 are angles of elevation.
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