Arrange the steps in the correct order to solve this trigonometric equation. 2sin^2x - sin x = 0 for 0 degrees less than equal to x less than equal to 90

1.  2sin^2x-sinx-1=0

2. substituting sinx with u  

3. 2u^2-u-1  

4. (2u+1)(u-1)=0

5. u=1 and u=-1/2

6. replacing u with sinx so sinx=1 sinx=-1/2  

7. x=90 0  <x<90

8.x=90

Step-by-step explanation:

i just took the test and got it right

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.