Ask a question
0 0

Use the quadratic formula to find all solutions in the interval [0,2pi): tan^2x-6tanx+4=0

This is for my trig class, thanks for the help!
Tutors, please sign in to answer this question.

2 Answers

Now you have a better chance of getting it.  Excel has an atan function
tanx has a periodicity of ?
By completing the square,
(tanx+3)^2 = 5
tanx = -3+/-sqrt(5)
Can you get x now?