In ∆DEF measure of angle E is 90o. If cosD = 5/13, and DE = 1cm, then what is the length (in cm) of side EF? - Study24x7
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soyab khan
03 Apr 2019 03:34 PM study24x7 study24x7

In ∆DEF measure of angle E is 90o. If cosD = 5/13, and DE = 1cm, then what is the length (in cm) of side EF?

A

2.6

B

2.4

C

2.2

D

1

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