Identify the correct trigonometry formula to use to solve for x.11Х55°

Question

asked Jul 11, 2023 45.6k views

1 Answer

Miroslav Trninic · Answer 1 · 2023-07-17T09:28:35+0000

From the right-angled triangle given, let us identify the given sides with reference to the angle 55°

$\begin{gathered} x\text{ is the hypotenus(the longest side opposite the right angle)} \\ 11istheadjacentsidetotheangle55^0 \end{gathered}$

The correct trigonometry that has both the adjacent and the hypotenuse is the cosine

To solve for x, we will then use cosine as follows

$\begin{gathered} \cos A=\frac{Adjacent}{\text{Hypotenus}} \\ \cos 55^0=(11)/(x) \end{gathered}$
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