Here is a little tip to how to remember the formulas for your favorite trigonometry functions!

$\frac {1}{sinx} = cosecx$

$\frac {1}{cosx} = secx$

$\frac {1}{tanx} = cotx$

Notice how the third alphabet of $cosec, sec, cot$ corresponds to the first letter of $sin, cos, tan$ respectively? 🙂

Hope it helps! Do you have any other cool ways? Share in the comments below!