3.
Solve tan 2x + tan x=0, for 0 < x < 2π

Start by getting everything on the same side of the equals sign and then set it equal to 0.  .  Factor out the common tan^2x like this: .  Now we have 2 separate equations to solve:  and sinx = 0.  Now we have to figure out where tan^2 is 0 between 0 and 2pi.  If we include 2pi, the solutions for that equation are .  You can test those out on your calculator just to be sure.  There's only one value of x for the next equation.  The only place between 0 and 2pi where the sin x = 1 is at x = .  And there you go!

Step-by-step explanation:

dont trust me im no expert these losers made me fail a test bro this sucks

step-by-step explanation:

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here