SOLUTION: Find all values of t in the interval [0, 2π] satisfying the given equation. (Enter your answers as a comma-separated list.) (4 cot t)^2 = 48

Algebra ->  Trigonometry-basics -> SOLUTION: Find all values of t in the interval [0, 2π] satisfying the given equation. (Enter your answers as a comma-separated list.) (4 cot t)^2 = 48       Log On


   



Question 949907: Find all values of t in the interval [0, 2π] satisfying the given equation. (Enter your answers as a comma-separated list.)
(4 cot t)^2 = 48

Found 2 solutions by lwsshak3, ikleyn:
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Find all values of t in the interval [0, 2π] satisfying the given equation. (Enter your answers as a comma-separated list.)
(4 cot t)^2 = 48
take sqrt of both sides
4cot t=±√48=4±√3
cot t=(4±√3)/4
..
cot t=(4+√3)/4
t≈1.04, 4.18 (radians) (In quadrants I and III where cot>0)
..
cot t=(4-√3)/4
t≈1.94, 4.34 (radians) (In quadrants II and IV where cot<0)

Answer by ikleyn(53937) About Me  (Show Source):
You can put this solution on YOUR website!
.
Find all values of t in the interval [0, 2Ï€] satisfying the given equation.
(Enter your answers as a comma-separated list.)
(4 cot t)^2 = 48
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        The solution in the post by @lwsshar3 is INCORRECT.
        Below is my correct solution.


(4*cos(t))^2 = 48

16cot(t)^2 = 48

cot(t)^2 = 48/16 = 3

cot(t) = +/- sqrt%283%29

t = pi%2F6, 5pi%2F6,  7pi%2F6,  11pi%2F6.    ANSWER

Solved correctly.