Question

Solve for X using cosine law along with with written explanation.

Answer 1

Given:

The two sides and angle of triangle are

`\begin{gathered} a=19m \\ b=25m \\ \angle C=65\degree \end{gathered}`

Required:

To find the value of X.

Step-by-step explanation:

By cosine rule

`\begin{gathered} X=√(a^2+b^2-2ab\cos C) \\ \\ =√(19^2+25^2-2*19*25\cos65) \\ \\ =24.17m \end{gathered}`

Final Answer:

The value of X is

`X=24.17m`