Question

which equation will be used to find the length of x?​

Answer 1

Answer:

what are the other angles??

Step-by-step explanation:

something should be given.. the question is incomplete i guess

Answer 2

Given:

As shown in attached

To FInd:

The value of x

Solution:

Given 2 lengths and 1 angle, we can use the cosine rule to find the missing length.

Formula:

$c^2 = a^2 + b^2 - 2ab \cos C$

Find the length x:

$c^2 = a^2 + b^2 - 2ab \cos C$

$x^2 = 10^2 + 9^2 - 2(10)(9) \cos (45)$

$x^2 = 100 + 81 - 90\sqrt{2}$

$x^2 = 181 - 90\sqrt{2}$

$x = 7.33$

Answer: x = 7.33 units