Question

Find x and round to the nearest tenth.

Answer 1

its actually 83 not 83.0

Explanation:

im only saying this bc i know people with type 83.0 in the box

Answer 2

83.0°

Explanation:

Given ∆XYZ, with 3 known sides, to find angle X, apply the Law of Cosines, c² = a² + b² - 2ab*cos(C).

For convenience sake, this formula can be rewritten to make the angle we are looking for the subject of the formula.

Thus, we would have this following:

`cos(C) = (a^2 + b^2 - c^2)/(2ab)`

Where,

C = X = ?

a = 8 ft

b = 16 ft

c = 17 ft

Plug in the stated values into the formula and solve for X

`cos(X) = (8^2 + 16^2 - 17^2)/(2*8*16)`

`cos(X) = (320 - 289)/(256)`

`cos(X) = (31)/(256)`

`cos(X) = 0.1211`

`X = cos^(-1)(0.1211)`

`X = 83.0` (to nearest tenth)