How to derive the distance formula for polar coordinates.
How to use the distance formula to derive the equation for a circle.
How to derive the equation for a circle using the distance formula.
How to differentiate a composite function when the outside function is the natural logarithm.
How to derive the formula to find the sum of angles in any polygon.
How to derive the area of a triangle formula using the rectangle area formula.
How to derive the area of a trapezoid formula using the area of a rectangle.
How to derive the equation for the distance between two points using the Pythagorean Theorem.
How to use the unit circle to derive the tangent identity and the Pythagorean identity.
How to derive two more cosine double-angle formulas.
How to use the power reduction formulas to derive the half-angle formulas.
How to interpret the value of a limit important in the derivative of exponential functions.
How to derive the area formula of a kite based on the rectangle formula; how to calculate the area of a rectangle using diagonal lengths.