7
is the answer that is the proper answer

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Ответ:

jimena15

07.04.2021

Mathematics

Option A:

The equation used to solve for angle N is

$6.2^{2}=3.6^{2}+4.3^{2}-2(3.6)(4.3) \cdot \cos N$

Solution:

Given data:

MO = 6.2 cm

ON = 4.3 cm

MN = 3.6 cm

To find the equation to solve for angle N:

Using cosine formula,

$c^{2}=a^{2}+b^{2}-2 a b \cdot \cos C$

Here, a = 3.6 cm, b = 4.3 cm, c = 6.2 cm, and angle A = angle C

Substitute these in the formula, we get

$6.2^{2}=3.6^{2}+4.3^{2}-2(3.6)(4.3) \cdot \cos N$

The equation used to solve for angle N is

$6.2^{2}=3.6^{2}+4.3^{2}-2(3.6)(4.3) \cdot \cos N$

Hence option A is the correct answer.

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