Math
posted by Anonymous .
What is the exact value of cot(5pi/6)?

If you draw the angle, then draw a line down to the x axis, you will find that your reference angle is pi/6.
tan(pi/6) should be a memory value; cot is its reciprocal. Remember that your angle is in Quadrant II. 
I'm sorry, I'm still confused :s

I cannot post images here  you'll have to draw it yourself.
1. Draw the units circle, then draw the angle 5pi/6.
2. draw a line from that angle to the x axis
3. The angle of the resulting triangle is your reference angle.
Can you get that far?
Respond to this Question
Similar Questions

precalc
Can someone help me find the exact value of 4csc(3pi/4)cot(pi/4)? 
MATH
What is the exact value of cot(5(pi)/6)? 
Math
What is the exact value of cot(5pi/6)? 
PreCalculus
Hi I need some assistance on this problem find the exact value do not use a calculator cot[(5pi)/12] Here is my attempt RT = square root pi = 3.14... cot[(5pi)/12]={tan[(5pi)/12]}^1={tan[(2pi)/12(8pi)/12]}^1={tan[pi/6(2pi)/3]}^1={(tan[pi/6]tan[(2pi)/3])/(1+tan[pi/6]tan[(2pi)/3])}^1={((RT[3])/3+RT[3])/(1+((RT[3])/3)(RT3))}^1 … 
trig
using the fact that 5pi/8=1/2(5pi/8) and the half angle identity for cos to find the exact (in terms of radicals) value of cos(5pi/8) 
trig
Find the exact value of the trigonometic function at the given real number of cot(5pi/3) 
Math
Solve (sinx1)(cosx 1/2) = 0 where 0≤x<2pi a) pi/3, pi/2, 5pi/3 b) pi/6, 5pi/6, pi c) pi/3, pi, 5pi/3 d) pi/6, pi/2, 5pi/6 
math
determine the exact value of (cot pi/3) + (csc pi/3) / (cos pi/4). how is this calculated? 
Math/Precal
How do i find the exact value for (Cos 5pi/16)(Cos pi/16) + (sin 5pi/16)(sin pi/16) 
Trignometric
i)The angle á lies between 0 and 90 and is such that 2tan sqaure á + sec square á=54tan á. show that 3tan square á +4taná4=0 and hence find the exact value of taná ii)It is give that the angle â is such that cot(á+â) = …