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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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Answer:

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Step-by-step explanation:

Probability that BOTH are democrats means probability of <u>"one being democrat"</u> AND <u>"another also being democrat"</u>.

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Probability that a voter is democrat is 44% (0.44) -- stated in the problem


Now, Probability BOTH being Democrats is simply MULTIPLYING 0.44 with 0.44

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