The problem of finding the minimum (or the maximum) of a function is a familiar application of calculus. However, if the derivative of the function in question is not known, one must resort to numerical methods.
In 1678 Christiaan Huygens developed a wave theory of light in contradiction of Newton’s corpuscular theory. It was not published until 1690.
Suppose your teacher asks you to find the area of the following triangle.
The law of motion for a freely falling body was first enunciated by Galileo in the 17th century.
Q.941 On my desk calendar two numbers are given: the number of days in the year up to today, and the number remaining.
Q.931 In a large flat area of bushland there are two fire-spotting towers, one exactly 20km east of the other.