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lord [1]
3 years ago
8

Solve the equation cos2x = -1\2, for 0 < x < 360°.​

Mathematics
1 answer:
natta225 [31]3 years ago
6 0

Answer:

x = 60°, 120°

Step-by-step explanation:

If we let t=2x, our equation now becomes \cos{t}=-1/2, which is true for two values of t: 120° and 240°. Since t = 2x, we can say that 120^{\circ}=2x and 240^{\circ}=2x, and therefore x = 60^{\circ} and x=120^{\circ}

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3 years ago
Does anyone know the answer to this?
Elis [28]

65 + (3x-10) + 2x = 180

65 +5x-10 = 180

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x = 125/5 = 25


x = 25

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3 0
4 years ago
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Please help me answer. Thanks in advance.
Aleksandr [31]
  72kg - 54kg
180kg - xkg

cross multiply

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8 0
3 years ago
Joshua was offered a job that paid a salary of $77,500 in its first year. The salary was set to increase by 2% per year every ye
nalin [4]

Answer:

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Step-by-step explanation:

step 1: multiply the 2 by 5 and you get 10%

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10/100 x 77,500/1= $77.50

but when you roung it off you get 78 dollars

5 0
3 years ago
Read 2 more answers
2x = x +3<br> Help pls I can’t do this one
Fudgin [204]

Answer:

x=3

Step-by-step explanation:

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