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MATH / Triangle DEF is shown. What is cosE?

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

Triangle DEFDEF is shown. What is cosE\cos{E}? [asy] draw((0,0)--(7,0)--(7,24)--cycle,black+linewidth(1)); draw(rightanglemark((0,0),(7,0),(7,24),30),black+linewidth(1)); label("EE",(7,24),E); label("FF",(0,0),W); label("DD",(7,0),E); label("7",(0,0)--(7,0),S); label("24",(7,0)--(7,24),E); [/asy]
Plain-text mathematical notation (without MathML)
Triangle DEF is shown.  What is cosE?

[asy]
draw((0,0)--(7,0)--(7,24)--cycle,black+linewidth(1));
draw(rightanglemark((0,0),(7,0),(7,24),30),black+linewidth(1));
label("E",(7,24),E);
label("F",(0,0),W);
label("D",(7,0),E);
label("7",(0,0)--(7,0),S);
label("24",(7,0)--(7,24),E);
[/asy]
Original LaTeX notation
Triangle $DEF$ is shown.  What is $\cos{E}$?

[asy]
draw((0,0)--(7,0)--(7,24)--cycle,black+linewidth(1));
draw(rightanglemark((0,0),(7,0),(7,24),30),black+linewidth(1));
label("$E$",(7,24),E);
label("$F$",(0,0),W);
label("$D$",(7,0),E);
label("7",(0,0)--(7,0),S);
label("24",(7,0)--(7,24),E);
[/asy]

level

Level 1

type

Precalculus

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Source and history

task_id
1cdadf3f-bbc4-58fc-a227-c50e2151bffd
task_key
precalculus--test--1cdadf3f-bbc4-58fc-a227-c50e2151bffd
task_revision_id
1
config / split
precalculus / test

Official source

initial import