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alekssr [168]
3 years ago
8

1-cot2a+sin2a/1+cot2a+sin2a = tana PROVE ​

Mathematics
1 answer:
butalik [34]3 years ago
6 0

I think that's correct if yes so please mark me as brainlist and if its wrong so don't report my answer please

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Can y'all help me with this question?
Maslowich
The answer is A.27 it is 9 * 3 is how you get it
6 0
4 years ago
Able to help Q39? Thank you
Alex
A)

y  varies inversely as (x-1).

Implies    y  α  1/(x -1)

                 y =  k/(x-1).        Where k is constant of proportionality.

                 y*(x - 1) = k

when y = 12, x = 1/2

12*(1/2 - 1) = k

12*(0.5 - 1) = k

k = 12*(-0.5) = -6.

k = -6.

Equation connecting x and y

  y*(x - 1) = k,          recall k = -6

  y*(x - 1) = -6

b)

when x = a.

y*(x - 1) = -6

y*(a - 1) = -6

y = -6 / (a -1)

when x = 2a.

y*(2a - 1) = -6

y = -6 / (2a -1)

Difference in y is 1.8

-6 / (2a -1)  -  -6/(a - 1) = 1.8

-6 / (2a -1)  + 6/(a - 1) = 1.8

6 / (a -1) - 6 /(2a -1) = 1.8

6( 1/(a-1) -  1/(2a - 1)) = 1.8

1/(a-1) -  1/(2a - 1) = 1.8/6

1/(a-1) -  1/(2a - 1) = 0.3

((2a - 1) - (a - 1)) / ((a-1)(2a -1)) = 0.3

(2a - 1 -a + 1) /((a-1)(2a -1)) = 0.3

a / (2a² - 3a + 1) = 0.3

a/0.3 = 2a² - 3a + 1

10a/3 = 2a² - 3a + 1

2a² - 3a + 1 = 10a/3

2a² - 3a -10a/3 + 1 = 0

2a² - 19a/3 + 1 = 0

6a² - 19a + 3 = 0

This is a quadratic expression which can be factored.

6a² - 18a - a + 3 = 0

6a(a - 3) - 1(a - 3) = 0

(6a - 1)(a - 3) = 0         

6a - 1 = 0      a = 1/6

a - 3 = 0   a = 3.

a = 3  or  1/6

Since a is positive integer, a = 3 only.
4 0
3 years ago
Classify the random variables below according to whether they are discrete or continuous.a. The number of people in a restaurant
Murrr4er [49]

Answer:

a) Discrete

b) Continuous

c) Continuous

d) Discrete

e)Discrete

Step-by-step explanation:

Continuous:

Real numbers, can be integer, decimal, etc.

Discrete:

Only integer(countable values). So can be 0,1,2...

a. The number of people in a restaurant that has a capacity of 100.

You cannot have half a person, for example.

The possible number of people in the restaurant are 0, 1, 2,..., 100. So this variable is discrete.

b. The height of a randomly selected giraffe.

The giraffe can have half a meter, for example. That is, the height can be a decimal number. So this variable is continuous

c. The square footage of a house.

You can have half a square, for example. So this variable is continuous.

d. The number of light bulbs that burn out in the next week in a room with 10 bulbs.

Possible values: 0 bulbs, 1 bulb, ..., 10 bulbs

Only countable values.

So discrete

e. The number of points scored during a basketball game.

0 points, 1 point, 2 points, 10 points, ...

There are no half points in basketball.

So discrete

8 0
3 years ago
Which one is greater 140% or 0.14
Ivan
140% because you can convert 0.14 to 14% or u can convert 140% to 1.4.
4 0
3 years ago
[HELP]
SpyIntel [72]

Answer:

72 pages (648 discs)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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