analearLurk
analearLurk
24-11-2016
Mathematics
contestada
Solve sin2x + 4sin x + 3 = 0
Respuesta :
HomertheGenius
HomertheGenius
25-11-2016
sin² x + 4 sin x + 3 = 0
Substitution: u = sin x
u² + 4 u + 3 = 0
u² + 3 u + u + 3 = 0
u ( u + 3 ) + ( u + 3 ) = 0
( u + 3 ) ( u + 1 ) = 0
u = - 3, u = - 1;
sin x = - 3 ( false )
sin x = - 1
Answer:
x = 3 π / 2 + 2 k π
, k ∈ Z
Answer Link
VER TODAS LAS RESPUESTAS ( 85+ )
Otras preguntas
You have 1 case of soap bars and there are 150 bars in a case. You use 300 bars of soap per day. How many cases do you need to order to have enough for 7 days?*
In a chemical reaction, water decomposes to form hydrogen and oxygen. What is the correct term for the water? A. an element B. an atom C. a product D. a reactan
What are countries with little industry called?
Agricultural revolution led to the need for organized
You have 1 case of soap bars and there are 150 bars in a case. You use 300 bars of soap per day. How many cases do you need to order to have enough for 7 days?*
. Alpha Particles a. What is the mass number of an alpha particle? b. What is the identity of an alpha particle? c. What kind of charge does an alpha particle h
40 is 50% of what number?
During metaphase, chromosomes line up along the equator of the cell. The cell then moves into anaphase, with microtubules attaching to the _______ of each chrom
The _____________ have(has) many productive coalfields in West-Central Europe. A- navigable river B- English Channel C- North Sea D- Central Uplands
Mandy,Jeremy, and Lily went to am amusement park during their summer vacation. Mandy spent $16.25 at the amusement park. Jeremy spent $3.40 more than Mandy spen
