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 ( 55+ )
Otras preguntas
What are the coordinates of side HI? (–8, 1) and (–4, –3) (–4, 7) and (–2, 5) (1, –8) and (–3, –4) (7, –4) and (5, –2)
I need help with making predictions with probability please help me correctly answer these questions.
What stylistic device is Minnow using in paragraph 9? A) metonymy B) anaphora C) asyndeton D) rhetorical question
What was the effect of Carter’s attempts to free the hostages in Iran? The hostages were returned to the United States immediately. The United States increased
ttttttttttttttttttftgtftftffftf
Soviet satellites formed in the eastern bloc
What is the purpose of this letter?
The hardy-weinberg equation can be applied to estimate allele frequencies in future generations based on the current _________ frequency in a population.
Do you think this interdisciplinary approach is positive or negative for understanding crime?
Convert 150 pounds into kg.
