Mathematics, 13.07.2019 10:30 eqemilychi9461
Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5
Answers: 2
![\bf 7sin^2(x)-14sin(x)+2=-5\implies 7sin^2(x)-14sin(x)+7=0 \\\\\\ \stackrel{\textit{notice, this is just }ax^2+bx+c}{\stackrel{\stackrel{ax^2}{\downarrow }}{sin^2(x)}\stackrel{\stackrel{bx}{\downarrow }}{-2sin(x)}\stackrel{\stackrel{c}{\downarrow }}{+1}}=0\implies [sin(x)-1][sin(x)-1]=0 \\\\\\ sin(x)-1=0\implies sin(x)=1\implies \measuredangle x=sin^{-1}(1)\implies \measuredangle x=\cfrac{\pi }{2} \\\\\\ ~~~~~~~~~~~~~~\stackrel{\textit{and for all solutions using }n \in \mathbb{Z}}{\cfrac{\pi }{2}+2\pi n}](/tpl/images/0084/4324/a4aec.png)
Another question on Mathematics
Mathematics, 21.06.2019 16:50
Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.
Answers: 2
Mathematics, 21.06.2019 18:50
The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year
Answers: 3
Mathematics, 21.06.2019 19:00
Define multiplicative inverse. give an example of a number and its multiplicative inverse.
Answers: 1
Mathematics, 21.06.2019 21:00
If a is a nonzero real number then the reciprocal of a is
Answers: 2
You know the right answer?
Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5...
Questions
History, 28.10.2020 05:50
Spanish, 28.10.2020 05:50
English, 28.10.2020 05:50
Law, 28.10.2020 05:50
Mathematics, 28.10.2020 05:50
English, 28.10.2020 05:50
Social Studies, 28.10.2020 05:50
Mathematics, 28.10.2020 05:50
Mathematics, 28.10.2020 05:50
