If you want to work in Engineering knowledge of trig is a must have. For instance calculating the deflection of a structural beam as you load it with weight (a

If you want to work in Engineering knowledge of trig is a must have. For instance calculating the deflection of a structural beam as you load it with weight (a discipline known as statics), depends heavily on trig. Anything involving rotation and angular momentum (such as gears and axles) require knowledge about trig. Other than that triangulation- computing the distance between points is a useful practical application.