are logs with base e and are denoted by ln. Thus, you should know the following:
ln 1 = 0ln e = 1ln ex = xeln x = xThe change of base rule is: logb x =
Geometry
The area of a triangle is (base)(height).
The area of a rectangle is (base)(height).
The area of a trapezoid is (base 1 + base 2 )(height).
The area of a circle is πr^2.
The circumference of a circle is 2πr.
The Pythagorean Theorem states that the sum of the squares of the legs of a right triangle equals the square
of the hypotenuse. This is more commonly stated as a^2 + b^2 = c^2 , where c equals the length of the
hypotenuse.
The volume of a right circular cylinder is πr^2 h.
The surface area of a right circular cylinder is 2πrh.
The volume of a right circular cone is πr^2 h.
The volume of a sphere is πr^3.
The surface area of a sphere is 4πr^2.
Trigonometry
Given a right triangle with sides x, y, and r and angle θ below: