Two guy wires from the top of a 220-foot radio antenna are anchored to the ground by two large concrete posts.The antenna is perpendicular to the ground and between the two posts. If θ=39 degrees and ϕ=46 degrees then the distance between the two posts is ____ feet.   

Two guy wires from the top of a 220foot radio antenna are anchored to the ground by two large concrete postsThe antenna is perpendicular to the ground and betwe class=

Respuesta :

Given

h = 220 ft

Procedure

2 triangles are formed.

angle theta is 39 degrees.

[tex]\begin{gathered} \tan 39=\frac{x}{220} \\ x=220\cdot\tan 39 \\ x=178.15 \end{gathered}[/tex]

angle phi is 46 degrees.

[tex]\begin{gathered} \tan 46=\frac{x}{220} \\ x=220\cdot\tan 46 \\ x=227.81 \end{gathered}[/tex]

Length between two posts

[tex]\begin{gathered} T=178.15+227.81 \\ T=405.96 \end{gathered}[/tex]

The length would be 405.96 ft