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Given the right △△DEF, DE = 30, EF = 72 and DF = 78. Find the cos F=
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Given the right △△DEF, DE = 30, EF = 72 and DF = 78. Find the cos F=

Given the right △△DEF, DE = 30, EF = 72 and DF = 78. Find the cos F=-example-1
User Shatina
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2 Answers

3 votes
The other person that answered should be right
User Jim Snyder
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2 votes

see the figure below to better understand the problem

cos(F)=EF/DF --------> by CAH

substitute given values

cos(F)=72/78

simplify

cos(F)=12/13

Option C

Given the right △△DEF, DE = 30, EF = 72 and DF = 78. Find the cos F=-example-1
User Mike Nguyen
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4.0k points
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