Hello!
2cosФ + 1 = 0
Begin by isolating for cosФ. Subtract both sides by -1:
2cosФ = -1
Divide both sides by 2:
cosФ = -1/2
Using the unit circle, we know that from [0, 2π), values that have a cosine of -1/2 are 2π/3 and 4π/3.
Therefore, the solutions of this equation are:
Ф = 2π/3 and 4π/3
U should subtract the first number and the second one together and see what you get
Answer:
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(Hope this helps)
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Kip starts with 1 4/6 lbs of toffee. First we need to convert this to an improper fraction, the improper fraction is 10/6
Now subtract 5/6 from 10/6,
10/6 - 5/6 = 5/6
Kip has 5/6 lbs of toffee left. He gave half of what he originally had to his friend.
Hope that helps ya!
Answer:
x = 8, y = 8√2
Step-by-step explanation:
x = 8
y = 8(√2) = 8√2
