spookyrevenge
spookyrevenge spookyrevenge
  • 11-08-2017
  • Mathematics
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PLEASE HELP! URGENT!
write and solve an equation to calculate the value of the variable

PLEASE HELP URGENT write and solve an equation to calculate the value of the variable class=

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mreijepatmat
mreijepatmat mreijepatmat
  • 11-08-2017
a) sin 15° = (opposite side)/(hypotenuse)

sin 15° = x/20, but sin 15° = 0.25881
0.25881 = x/20 → x = 0.25881.(20) → x = 5.17
 
b) cos Ф° = adjacent side/hypotenuse

cos Ф° = 10/11 → cos Ф° = 0.9090.

cos⁻¹(0.9090) = Ф°  → Ф° = 24.62°

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