Question

Please help me if you can! in the image it shows a problem I need guidance on.

Answer 1

We can use trigonometric functions to determine how far it is across the lake.

Here, use tangent of angle A:

$\begin{gathered} \tan 40^o=\frac{a}{630} \\ 0.839=\frac{a}{630} \\ 0.839\times630=a \\ 528.632=a \end{gathered}$

Thus, the lake is 529 yards across.