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Inga [223]
3 years ago
9

Help ༎ຶ‿༎ຶ i dont get it​

Mathematics
2 answers:
svetoff [14.1K]3 years ago
5 0

Answer:

Step-by-step explanation:

You know the lengths of two sides and the angle between them, so use the Law of Cosines to find the third side.

x^2 = 10.5^2+ 5.4^2 -2(10.5)(5.4)cos20°

x ≈ 5.73 units

lesantik [10]3 years ago
4 0

Answer:

\underline{ \boxed{x = 5.7}}

Step-by-step explanation:

its \: simple \: and \: easy \ \: :  \: if \: you \: apply \: the \: cosine \: rule \to \\  {x}^{2}  =  {(10.5)}^{2}  + {(5.4)}^{2}  - 2(10.5)(5.4) \cos(20)  \\  {x}^{2}  =( 110.25 +29.16 ) - (113.4)( \cos(20))  \\  {x}^{2}  = 139.41 - 106.5611432 \\  {x}^{2}  = 32.8488568 \\ x =  \sqrt{32.8488568}  \\ x = 5.7313922218 \\ \boxed{x = 5.7}

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