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elixir [45]
3 years ago
13

Anyone who’s good at trigonometry?

Mathematics
2 answers:
romanna [79]3 years ago
4 0

Answer:

Step-by-step explanation:

u know the sinus theorem for the area of a triangle

u can search it sinus theorem triangle

for the solution:

12.4/sin(74)=y/sin(39)

y=7.85 cm

Musya8 [376]3 years ago
3 0

Answer:

Length y is 8.12cm

Step-by-step explanation:

Use the law of sines.

\frac{sin(a)}{A} =\frac{sin(b)}{B} ⇒\frac{sin(39)}{y} =\frac{sin(74)}{12.4}

y(\frac{sin(39)}{y}) =y(\frac{sin(74)}{12.4})

sin(39)=y(\frac{sin(74)}{12.4})

y=\frac{sin(39)}{sin(74)/12.4}

y=\frac{12.4*sin(39)}{sin(74)}

y=8.118052433 if you don't round.

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