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Scrat [10]
3 years ago
14

Use a sum or difference formula to find the exact value of the following. cos Sin COS

Mathematics
1 answer:
Radda [10]3 years ago
3 0
Sin (2pi/3) = sin(2pi/6)

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Using algebra, solve the inequality<br> writing your answer in set notation.<br> x²-x&gt; 20
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Answer:

(-4, 0) U (1, ∞)

Step-by-step explanation:

Set each factor EQUAL to zero to find the zeroes (since it is not actually equal to zero, you will use an open circle when graphing and an open bracket when writing in interval notation).

x = 0           x-1 = 0             x + 4 = 0

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Next, choose a value to the far left, between each of the zeroes, and to the far right to evaluate if it makes a true statement when input into the given inequality.

far left (I choose -5): -5(-5 - 1)(-5 + 4) > 0   →  (-)(-)(-) > 0  →   negative > 0  FALSE

- 4 to 0 (I choose -2): -2(-2 - 1)(-2 + 4) > 0   →  (-)(-)(+) > 0  →   positive > 0  TRUE

0 to 1 (I choose 0.5): .5(.5 - 1)(.5 + 4) > 0   →  (+)(-)(+) > 0  →   negative > 0  FALSE

far right (I choose 2): 2(2 - 1)(2 + 4) > 0   →  (+)(+)(+) > 0  →   positive > 0  TRUE

3 0
1 year ago
Watch help video
adelina 88 [10]

Answer:

m= 6/-5

Step-by-step explanation:

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m= 12/-10

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D = {-1, -2, 0, 1, 2} is d a subset of itself
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Step-by-step explanation:

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Trapezoids cannot have all equal side lengths or 90 degree angles. 
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