mnfakhar mnfakhar
  • 26-05-2016
  • Mathematics
contestada

Evaluate and simplify cos 2pi/3. The options for answers are in the picture attachment, but I have NO idea how to get any of them? Please, Any help is appreciated (:

Evaluate and simplify cos 2pi3 The options for answers are in the picture attachment but I have NO idea how to get any of them Please Any help is appreciated class=

Respuesta :

Tareki
Tareki Tareki
  • 26-05-2016
when pi is inside the trigonometric function you can subs. it by 180 degree 
so cos(2*180/3) = cos(120) = -0.5 
Answer Link

Otras preguntas

what are the geométric constructions using both compáss method and tecnology méthod
A neutral beryllium atom has four protons and five neutrons. How many electrons does it have?
Which of the following carries the hereditary information for cells?
If you add a ten thousands digit that is 3 times the thousands digit to the number 3721, what is the new number?
Please help me on this problem.
Urgent math help need will mark brainliest Please look at the photo for question and answer choices
what kind of goods were being taxed by britain
The environment is considered a non-controllable risk factor. A. True B. False
find the greatest common factor of each set of numbers 24 40 and 56
What is the answer of 7/10 × ?/10 =