# How do you find the equation of a line tangent to a graph #z = sqrt (60 - x^2 - 2y^2)# at the point (3, 5, 1)?

##### 1 Answer

Oct 17, 2015

#### Explanation:

In the case of the function of two variables, we have tangent plane(s). So, if you mean tangent plane, the equation is:

Every line that lies in the plane we've just found is tangent to a graph at a given point; there exists infinite number of such lines.