# Trig in equation

1. Jan 18, 2007

### Aristodol

we have:

sin^2 x(tan x)=1356

it is very simple I no but I just can't remember the way to go about solving this problem, especially because of the sin^2

2. Jan 18, 2007

### chanvincent

1. $$tan(x) = \frac{sin(x)}{cos(x)}$$
2. $$cos(x) = \sqrt{1 - sin^2(x)}$$
4. do a substitution $$y = sin^2(x)$$, then you will have a 3th order polynomial