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  • 03-04-2020
  • Mathematics
contestada

find the length of bc
give your answer to 3 signifcant figures

find the length of bc give your answer to 3 signifcant figures class=

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adebayodeborah8
adebayodeborah8 adebayodeborah8
  • 03-04-2020

Answer:

hypotheneus = - 20. 4

Step-by-step explanation:

to evaluate for the length of side BC ,  using SOH CAH TOA

given angle Ф = 71°

adjacent = 6.3cm

hypotenus = ?

find the hypothenus side using CAH

cosФ = Adjacenct /hypotheneus

cos 71  = 6.3cm/hypotheneus

cross multtiply

cos 71 x hypotheneus = 6.3cm

-0.309 hypotheneus = 6.3cm

divide both sides by- 0.3

-0.309 hypotheneus/-0.3 = 6.3/-0.309

hypotheneus = - 20.388

hypotheneus = - 20. 4

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