Question

Anyone who’s good at trigonometry?

Answer 1

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

Answer 2

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.