Solve 2cos^2x+3sinx=0

Answers

Answer 1

Answer:

Answer:

$x = {\sin^( - 1) 2} \: \: or \: \: x = (7\pi)/(6), \: \: (5\pi)/(3)$

Step-by-step explanation:

$2 { \cos}^(2) x + 3 \sin x = 0 \n 2 {(1 - \sin}^(2) x) + 3 \sin x = 0 \n 2 - 2 \sin^(2) x+ 3 \sin x = 0 \n 2 \sin^(2) x - 3 \sin x - 2 = 0 \n 2 \sin^(2) x - 4\sin x + \sin x- 2 = 0 \n 2\sin x(\sin x - 2) + 1(\sin x - 2) = 0 \n (\sin x - 2)(2\sin x + 1) = 0 \n (\sin x - 2) = 0 \: or \: (2\sin x + 1) = 0 \n \sin x = 2 \: or \: 2\sin x = - 1 \n x = {\sin^( - 1) 2} \: \: or \: \: \sin x = - (1)/(2) \n x = {\sin^( - 1) 2} \: \: or \: \: x = (7\pi)/(6), \: \: (5\pi)/(3)$

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A technique used to rewrite a quadratic function in standard form to vertex form is

Answers

The vertex form of a quadratic function is given by
$f(x)=a(x-h)^(2)+k,$
where (h,k) is the vertex of parabola. In some literatures, the standard form of the quadratic equation is written as
$f(x)=a x^(2) +bx+c$
Therefore, in order to avoid the confusion, the first equation is taken as a vertex form. When the standard form is converted into the vertex form, the process is called completing the square.

Answer:

completing the square.

Step-by-step explanation:

trust me

What is the best way to organize a paragraph or passage about history of the cell phone

Answers

Answer:

Chronological Order

Step-by-step explanation:

Chronological order is the order in which items are listed based on the current time.

a bear was climbing a tree it took a few steps forward and then slipped a few steps backward after takin 12 total steps of equal distance it was back at its starting position how many steps did the bear take in the forward and backward directions

Answers

Answer:

Step-by-step explanation:

12+12

Suppose you select two numbers at random with replacement from the set {1, 2, 3} and then you form a rectangle with the first number as the length of the rectangle and the second number as the height of the rectangle. Let X be the area of the rectangle so formed. Find the probability mass function of X.

Answers

Answer:

Let X be the rectangular distribution

where X is uniformly distribute(3,1)

b=1

a=1

The PMF will be

f(x)=1/b-a

f(x)=1/3-1

f(x)=1/2

f(x)=0.5

A parallelogram has a base of 7 units. If the height has a corresponding unit of 2/3.

Answers

Answer:

7 x 2/3 = 14/3 = 4 2/3

To find the area of a parallelogram, simply multiply the base times its height.

How do you solve this math problem 6x-5y=712x-10y=1

Answers

Combine like terms then either leave it where you get it or out in standard form

I found it easier to break them up and find the values of x and y singularly.. thats what I did in part 1.

Then plugging them in to find the values of the x and y foe the equation.. thats part 2

I wont lie these answer just look weird and could be wrong... but in math thats kinda normal so im not 100% but hopefully I was able to help in some way

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