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Illusion [34]
2 years ago
10

Given that sin x = cos 2x find the value of x​

Mathematics
1 answer:
natali 33 [55]2 years ago
7 0

Answer:

The most straightforward way to obtain the expression for cos(2x) is by using the "cosine of the sum" formula: cos(x + y) = cosx*cosy - sinx*siny. cos(2x) = cos² (x) - (1 - cos²(x)) = 2cos²(x) - 1. = 2cos²(x) - 1.

Step-by-step explanation:

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First of all, to find the slope, you need to subtract the y's in the numerator over the x's in the denominator. Then you use Y-Y₁=slope(X-X₁) using either of the two points. If you want to simplify it further into slope-intercept form, you need to distribute on the right side of the equation.
5 0
2 years ago
Mr. D'Agostino decided he wanted to build a pool in his backyard this summer. He sketched a drawing that had a scale of 1 in. =
Travka [436]

Answer:

46080 ft²

Step-by-step explanation:

Given :

Scale :

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3 years ago
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ivann1987 [24]

Answer:

not sure

Step-by-step explanation:

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8 0
2 years ago
What is the probability of getting either a sum of 5 or at least one 5 in the roll of a pair of dice?
maria [59]
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To get a sum of 5, there are 4 ways, (1,4),(2,3),(3,2),(4,1) with probability of 4/36=1/9

To get at least one 5, there are 6+6-1=11 outcomes (note (5,5) has been counted in both, so subtracted from sum).  The probability is 11/36

Since the two events are mutually exclusive (once we have a five, the sum can no longer be 5), we can add the probabilities to get the probability of one event or the other.

P(sum of 5 OR at least one 5)=1/9+11/36=4/36+11/36=15/36=5/9
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What is x minus the square root of 2
Zielflug [23.3K]

Answer:

x - sqrt(2)

Step-by-step explanation:

x - sqrt(2)

6 0
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