kailea2 kailea2
  • 04-02-2018
  • Mathematics
contestada

Cos x+ 2cosx + Sinx=0 solve the equation for the interval [0,2pi]

Respuesta :

Аноним Аноним
  • 04-02-2018
cos²(x) + 2cos(x) + sin²(x) = 0
 Note: cos²(x) + sin²(x) = 1
2cos(x) + 1 = 0
2cos(x) = -1
cos(x) = [tex]- \frac{1}{2} [/tex]
120 degrees and 240 degrees → [tex] \frac{2}{3} \pi [/tex] and [tex] \frac{4}{3} \pi [/tex]
Answer Link

Otras preguntas

Find the surface area of a cylinder with a diameter of 10 and a height of 45. Use 3.14 for pie. Round your answer to the nearest tenth. A) 1575 B) 1573 C) 1570
A variety of soil types are found in the united states primarily the areas of the country differ in
how does verbs work ?
Read the sentence. He _____ to pay his bills. What is the past tense of the verb “promise” A.is promising B.has promised C.promises D.promised
which statement describes a many-to-one function
no need to write a paragraph but pls help me understand the main concept
Why does gatsby want to have tea with daisy in nicks house?
What is the first step to solving this equation? 8 + 9x = -6
In circle S, what is the value of x? Enter your answer in the box. x = °
Answer question 24 and 25