TieraChwieroth239 TieraChwieroth239
  • 06-08-2014
  • Mathematics
contestada

.Find all solutions to the equation.

7 sin2x - 14 sin x + 2 = -5

Respuesta :

Аноним Аноним
  • 16-08-2014
[tex]7sin^2x-14sinx+2=-5\\\\7sin^2x-14sinx+2+5=0\\\\7sin^2x-14sinx+7=0\ \ \ \ \ |divide\ both\ sides\ by\ 7\\\\sin^2x-2sinx+1=0\\\\(sinx-1)^2=0\iff sinx-1=0\\\\sinx=1\Rightarrow x=\frac{\pi}{2}+2k\pi=\frac{4k+1}{2}\pi\ (k\in\mathbb{Z})[/tex]
Answer Link

Otras preguntas

add and simplify  9/16=1/2=?
I need help for algebra 2 for simplify form for example (3x-2i)(3x+2i)
Alex built a snowman using three snowballs,one small, one medium and one large, with diameters in the ratio 2:3:5.      Although highly unlikely due to the phys
I need help for algebra 2 for simplify form for example (3x-2i)(3x+2i)
who was the first president of the united states of america
vesicles that contain a cells digestive enzymes are called ?
vesicles that contain a cells digestive enzymes are called ?
Alex built a snowman using three snowballs,one small, one medium and one large, with diameters in the ratio 2:3:5.      Although highly unlikely due to the phys
Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The
log3(2x-5)=2 Answer is 41/2.  Why?