I answer is B your welcome.
The solutions appear to be
{π/2, 2π/3, 4π/3}.
_____
Replacing sin(2x) with 2sin(x)cos(x), you have
2sin(x)cos(x) +sin(x) -2cos(x) -1 = 0
sin(x)(2cos(x) +1) -(2cos(x) +1) = 0 . . . . factor by grouping
(sin(x) -1)(2cos(x) +1) = 0
This has solutions
sin(x) = 1
x = π/2and
2cos(x) = -1
cos(x) = -1/2
x = {2π/3, 4π/3}
Answer:
x = .140741
Step-by-step explanation:
0.7(3x−0.2)=0.3(0.8−2x)
Distribute
.7 * 3x - .7*.2 = .3*.8 - .3 * 2x
2.1x - .14 = .24 - .6x
Add .6x to each side
2.1x +.6x -.14 = .24 -.6x+.6x
2.7x -.14 = .24
Add .14 to each side
2.7x -.14+.14 = .24+.14
2.7x = .38
Divide by 2.7 on each side
2.7x/2.7 = .38/2.7
x = .140741
X method is the method to find the factors of the polynomial equation.The factor of the given polynomial is,
Thus the option 3 is the correct option,
<h3>
How to find factor of polynomial using X method?</h3>
X method is the method to find the factors of the polynomial equation.
The standard form of the quadratic equitation is given as,
Given information-
The equation given in the problem is,
Compare the above equation with the standard form. We get,
To find out the factor of above equation using X method, follow the steps.
- Step 1) Multiply and and place at the top of X as shown in the image.
- Step 2) Place at the bottom as shown in the image below.
- Step 3) Find two numbers that multiply the top number and to the bottom number .
- Step 4) Write the polynomial from the X box as,
Hence the factor of the given polynomial is,
Thus the option 3 is the correct option,
Learn more about the X method here;
brainly.com/question/24379507