Can somebody tell me how to do or at least give me the correct answers to a few problems here:

http://www.math.siu.edu/Finals/Fall11/109-web.pdf

#1 on page 6

#3 on page 8

#9 on page 4

#6 on page 2

Its the review for my precalc final and I need to understand those four... I really am just trying to power through this test because we are provided a note sheet that we can write.

Also a bonus: Find all solutions to the equation: 3(tan^2)x-1=0

The x is actually a theta on the review sheet.