The answer is no you cannot. Getting a car loan involves a contract. A 17 year old is still considered a minor in the eyes of the law. Because of this, a minor cannot enter into a binding contract.
The tangent at a given point on a curve is the straight line that just touches the curve at the given point. Leibniz defined this as being the straight line through two infinitesimally close points on the curve at that point, leading to the relationship between the slope of the tangent and the first derivative of the function (if both exist) at that point.
Definition in terms of sine and cosine. The tangent function, denoted , is defined as the quotient of the sine function by the cosine function, and it is defined wherever the cosine function takes a nonzero value. In symbols: Unit circle definition. The tangent function, denoted , is defined as follows.