l3ouieBisci
l3ouieBisci l3ouieBisci
  • 08-08-2016
  • Mathematics
contestada

Find all solutions to the equation sin2x + sin x = 0, sin2x = -sinx
hint: sin2x = 2sinxcosx

Respuesta :

HomertheGenius
HomertheGenius HomertheGenius
  • 12-08-2016
sin 2 x + sin x = 0,
2 sin x cos x + sin x = 0
sin x ( 2 cos x + 1 ) = 0
sin x = 0                 or :     2 cos x + 1 = 0
x 1 = k π                          2 cos x = - 1
k ∈ Z                                cos x = - 1/2
                                         x 2 = 2π/3 + 2 kπ,  x 3 = 4π/3 + 2 kπ,  k ∈ Z 

Answer Link

Otras preguntas

What is the point of view of the poem oxy Mendes and what effect does it have on the reader it hears
Can answer these questions ?
what is the name of the project designed to reveal the oceans to the world?​
7. A large truck is ahead of you and is turning right onto a street with two lanes in each direction. The truck: . May not turn without engaging its hazard ligh
WILL GIVE BRAINLIEST!! Factor completely. x^2−14x+48
how to make a tea? tell me step by step in passive voice​
During one waiter’s shift, he delivered 13 appetizers, 17 entrées, and 10 desserts.
how to solve log(3) 8 = x ?
Which goal is a possible purpose of a narrative? 1. to engage the reader II. to develop a message/theme III. to explore personal thoughts/ideas ll only I and II
The sketch shows the floor plan of a bathroom. The shower tray is 2'6" square and is fixed to the floor. The toilet and washbasin are both wall mounted.
good job