book Maths Puzzle Numerical Ability

dear : i want to solve this limit

limit ( sin x - tan x ) / x^3 at x tandes to 0

Read Solution (Total 0)

book Other Question

The length of a rectangle is 8 feet longer than its width which has the same dimensions as the sides of a square. If the area of the rectangle is equal to 160 square feet more than Problem is I=PRT and I need to solve for "r" can anyone help me in describing how I do this?