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Svetradugi [14.3K]
3 years ago
9

Can someone please help me! This is trigonometry

Mathematics
2 answers:
emmasim [6.3K]3 years ago
7 0
Use cosine rule to find both.

Finding theta.
4² = 5² + 2² - 2(5)(2)cosθ
16 = 25 + 4 - 20cosθ
-13 = -20cosθ
13/20 = cosθ

θ ≈ 49°

Finding x.
Use cosine rule again for the bigger triangle.
x² = 5² + 3² - 2(5)(3)cos(49)
x² = 25 + 9 - 30cos(49)
x² = 24.9822237...
x ≈ 4 cm

It is advised that you plug in these numbers yourself, because of rounding errors. These answers are based off of the initial rounding of θ
lbvjy [14]3 years ago
3 0
Tan=opposite over adjacent so the equation is tan=4/1 x=4
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