Triangle D E F is shown. Angle D E F is 140 degrees. The length of D E is 11, the length of E F is 9, and the length of D F is e
.
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°)
2 answers:
Answer:
e2 = 112 + 92 − 2(11)(9)cos(140°)
Answer:
A
Step-by-step explanation:
2020 Edge
You might be interested in
The answer is c, the average systolic blood pressure of all USA men aged 40-59
The answer is rounded to the nearest tenth.
3x - 2........................................
Answer:
C. 57.97%
Please mark Brainlyest
Answer:
It could be 42%
Step-by-step explanation:
