We want the slope, but all we have is the angle. What we need is a relationship that relates the two. This relationship is known as the “tangent function,” written as tan(x). The tangent of an ...

PT is a tangent and CT is a radius, therefore \(\angle CTP=90^\circ\). (This right angle is not usually marked for you on the diagram. You have to deduce it is there because PT is a tangent to the ...

More simply, opposite angles in a cyclic quadrilateral add up to 180°. A tangent is a straight line which touches the circle at a point but does not cut through the circle. There are two theorems ...

It also has built-in functions for tangent and hyperbolic tangent ... Excel also provides functions for converting angles between radians and degrees. Launch Excel and start a new spreadsheet.