Ice2zoey1Chard
Ice2zoey1Chard Ice2zoey1Chard
  • 15-06-2016
  • Mathematics
contestada

Evaluate
a) sin (4pi/3)
b) cos (5pi/6)

Respuesta :

padawan
padawan padawan
  • 15-06-2016
sin(pi + a) = -sin(a)
sin(4pi/3) = sin(pi + pi/3) = -sin(pi/3)

cos(pi-a) = -cos(a)
cos(5pi/6) = cos(pi -pi/6) = -cos(pi/6)
Answer Link
HomertheGenius
HomertheGenius HomertheGenius
  • 21-06-2016
a) sin ( 4π/3 ) = sin 240° = sin ( 180° + 60°) = - sin 60° = [tex]- \frac{ \sqrt{3} }{2} [/tex]

b) cos (5π/6 ) = cos 150° = cos ( 90° + 60° ) = - sin 60°=[tex]- \frac{ \sqrt{3} }{2} [/tex]
 
Answer Link

Otras preguntas

If the resistance reading on a dmm’s meter face is 22.5 ohms and the range selector switch is set to the R x 100 range what’s the actual measured resistance of
What's the angle sum of a polygon having 7 sides.
two easy uses of mixture​
Which expression is equivalent to RootIndex 4 StartRoot x Superscript 10 Baseline EndRoot?
The assertion that non-formal institutions have no role to play at the processing stage of the systems theory is an empty rhetoric. What is your comment?​
Goal setting is a valuable tool for improving your own performance and managing that of your subordinates. a. True b. False
help me I m stuck on this question
National rights definition
A large diamond with a mass of 481.3 grams was recently discovered in a mine. If the density of the diamond is 3.51 grams over centimeters cubed, what is the vo
5-5 TIME TO REACH A FINANCIAL GOAL You have $33,556.25 in a brokerage account, and you plan to deposit an additional $5,000 at the end of every future year unti