Question

\[Solve ~ for ~~~ 0 \le \phi \le 2 \pi\]\[3\sec^2 \phi - \sec \phi - 3 = 1\]

Answer 1

3sec^2x-secx-2=0
(secx-1)(3secx+2)=0

secx=1, secx=-2/3
1/cosx =1 , 1/cosx=-2/3

cosx=1, cosx=-3/2

Answer 2

I don't think that's correct, because it would be -4 not -2

Answer 3

But, please see if you can solve it! I need to go for lunch. I'll be back soon.

Answer 4

x=0, 360

Answer 5

That's not the answer in the book either... It says the answer is 0.72, pi, 5.56