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OpenStudy (anonymous):
in triangle DEF, m
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OpenStudy (angela210793):
DE=6 cosF=8/10 ---->maybe abt 30..
OpenStudy (anonymous):
arccos(8/10)=36.9
OpenStudy (anonymous):
okay thats the right anser, but how do i show my work?
OpenStudy (angela210793):
Pythagoras theorem 10^2=8^2+DE^2 100=64+DE^2 DE=sqr36=6 cosF=8/10
OpenStudy (angela210793):
understand it?
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OpenStudy (anonymous):
yessm thank you so much
OpenStudy (angela210793):
uw :)
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