kindkt133 kindkt133
  • 26-04-2019
  • Mathematics
contestada

Solve the equation if 0° < x < 360° cos x = - 1/2
​

Respuesta :

altavistard
altavistard altavistard
  • 26-04-2019

Answer:

120° and 240°

Step-by-step explanation:

The given info about the angle x is  cos x = - 1/2.

By definition, cos x = - 1/2 = (adjacent side) / hypotenuse, so here we can assume the adjacent side is -1 and the hypotenuse is 2.

A negative cosine tells us that the angle is in Quadrant II or Quadrant III.

If x is in Quadrant II, then its value is 120°

If x is in Quadrant III, then its value is  120° + 120°, or 240°

Check:  

Answer Link

Otras preguntas

Write a dialogue using estar or ser 10+ times?
why did advances industry occur mainly in the north? please Answer
Find a number that is more than 50 but less than 100. When the number divided by 7, the remainder is 4. When the number is divided by 10, the remainder is 8. Wh
what is the likely mechanism of inheritance for a character with a large range of phenotypes?
What is the term for an unsaturated hydrocarbon with at least one double carbon-carbon bond?
What type of government does Botswana have? Who is their president?
What percent of 125 is 24
how do I solve this problem? mars rotates on its axis at the rate of . 2552 rad/hr how many hours are in a martian day?
What are ethos logos and pathos
What is the simplest form of the expression 6x(x − 4) − 16x2 − (9x − 1)