Click the first cell under the Tangent label. Click on the function (fx) button at the top of the Microsoft Excel sheet to open the Insert Function wizard. Choose the "Math & Trig" category to ...

An example of this can be seen below. Once the tangent is found you can use it to find the gradient of the graph by using the following formula: \(\text{Gradient to the curve =}~\frac {y_2-y_1} ...

Save guides, add subjects and pick up where you left off with your BBC account. As a tangent is a straight line it is described by an equation in the form \(y - b = m(x - a)\). You need both a ...