ibis121 ibis121
  • 06-12-2014
  • Mathematics
Answered

how to find cos(-19pi/6)



Answer :

jamiealt123 jamiealt123
  • 06-12-2014
Use the unit circle.

-19pi/6 is the same as 3pi + pi/6
This means that it goes around the unit circle 3pi times and ends up at 7pi/6

So -19pi/6 is equivalent to 7pi/6.

Looking at the unit circle, cos(7pi/6) = -√3/2
Answer Link

Other Questions

How were life forms affected by the rise in atmospheric oxygen levels that began 2.2 billion years ago?
Data are drawn from a symmetric and bell shaped distribution with a mean of 120 and a standard deviation of 5. There are 900 observations in the data set. What
what is the answer for (20,8),(9,16) ?
what is the answer for (20,8),(9,16) ?
Prove that (x^5)-(x^2)+2x +3=0 has at least one real root. Prove that x=cosx has at least one solution.
Which equation has the same y-intercept as y=4x-3?a. y-3=x              b. y=8x+3    c. 3-y=4x      d. y=-3+8xWhich of the following is the equation of the line
Scarcity is the condition of not having enough goods and services to satisfy everyone's?
Data are drawn from a symmetric and bell shaped distribution with a mean of 120 and a standard deviation of 5. There are 900 observations in the data set. What
(10y^3+20y^2+55y)/5y
Find Domain of the functionsquare root of (x-8)/x(x-9)