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fiasKO [112]
4 years ago
5

What is the answer of a ?

Mathematics
1 answer:
Scorpion4ik [409]4 years ago
4 0

Answer:

<h2>2.2</h2>

Step-by-step explanation:

Use the cosine law (look at the picture).

We have:

a=a\\b=4\\c=3\\\gamma=32^o

a^2=4^2+3^2-2(4)(3)\cos32^o

\cos32^o\approx0.848 → look at the second picture

a^2=16+9-24(0.848)\\\\a^2=25-20.352\\\\a^2=4.648\to a=\sqrt{4.648}\\\\a\approx2.2

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