SOLUTION: Find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas. cot(u) = -5, 3&#960; 2 < u < 2&#960;

Algebra ->  Trigonometry-basics -> SOLUTION: Find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas. cot(u) = -5, 3&#960; 2 < u < 2&#960;       Log On


   

Question 298029: Find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas.
cot(u) = -5, 3π
2 < u < 2π

Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Here are the double angle formulas:
cos 2u = 2cos^2 u − 1
sin2u = 2sinucosu
tan2u = (2tanu)/(1 - tan^2 u)
The value of u lies between 2pi and 2.
I'm sure you can do it now.