In δdef, de = 11, ef = 9, and angle e = 140°. which equation correctly uses the law of cosines to solve for the third side? e2 =

Question

sergejj [24]

3 years ago

4

In δdef, de = 11, ef = 9, and angle e = 140°. which equation correctly uses the law of cosines to solve for the third side? e2 =

112 92 − 2(11)(9)cos(140°) 112 = e2 92 − 2e(9)cos(140°) 92 = e2 112 − 2e(11)cos(140°) e = 11 9 − 2(11)(9)cos(140°)

Mathematics

2 answers:

viva [34] · Answer 1 · 2022-04-12T22:22:13+03:00

viva [34]3 years ago

5 0

I believe the correct answer from the choices listed above is the first option. The equation that correctly ses the law of cosines to solve for the third side would be <span>e2 = 11^2 + 9^2 − 2(11)(9)cos(140°). Hope this answers the question. Have a nice day.
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Sindrei [870] · Answer 2 · 2022-04-13T00:24:49+03:00

Sindrei [870]3 years ago

5 0

It would be the first one on edg. the other person that answered is correct thanks!!!