Question

Find all solutions in the interval [0, 2π).

7 tan3x - 21 tan x = 0

Answer 1

Is it tan^3 or tan(3x) ?

Answer 2

tan^3

Answer 3

Factor out 7tanx

Answer 4

So is it (7tanx^2x)-(3tanx)=0

Answer 5

Supposing you have :
\[7y^3-21y=0\]

Answer 6

Could you factor 7y out of that?

Answer 7

Yeah

Answer 8

Do it. What do you get?

Answer 9

7(y^3)-(3y)