# Tag: mathispower4u

## Ex: Solve sec(x)=a Without a Calculator

[Voiceover]- In this lesson we’ll solve the equation secant theta equals two divided by square root of three and secant theta equals negative square root of two on the given interval, without a calculator. So, because we’ll be solving these equations without a calculator, we’ll cover how to solve them using a unit circle as […]

## Fraction, Decimal, Percent Conversions (Not Basic, No Calculator)

We are asked to complete the following table, in the first row we want to convert a fraction to a decimal and percent. In the second row we want to convert the decimal to a fraction and percent. In the third row we want to convert the percent to a fraction and decimal. While there […]

## Quadratic Inequality Application: Solve on Graphing Calculator

The function f of x models the annual consumption of beans in tons in the US from 2000 to 2017, where x represents the number of years since 2000. For part A, we’re asked to use a graphing method to determine the years in which the consumption of beans was greater than 21,360 tons per […]

## Ex: Solve cot(x)=a Without a Calculator

We want to solve the equation cotangent theta equals square root of three and the equation cotangent theta equals a negative square root of three divided by a three on the interval from zero to two pi radians. We want to solve these equations without a calculator which means we’ll be using reference triangles in […]

## Square a Two-Digit Number Ending in 5 without Using a Calculator

Welcome to a video that will show how to square a two digit number that ends in five quickly and without the use of a calculator. The result of squaring any two-digit number that ends with five starts with the number you get by multiplying the first digit of the number you are squaring with […]

## Ex: Solve a Trigonometric Equation Using a Graphing Calculator

We want to solve a trig equation graphically using a graphic calculator. We want to give the first two positive radian solutions rounded to four decimal places. So to solve this graphically, we’ll enter the left side of the equation, in y one, we’ll enter the right side of the equation, in y two. And […]

## Ex: Solve tan(x)=a on [0,2pi) with a Calculator (negative a)

We want to solve the equation tan x equals negative six on the interval from zero to two pi radians. The first thing we might notice here is we aren’t going to find tangent function values of negative six on the unit circle or using reference triangles, so we’ll have to use a calculator in […]

## Square Any Two-Digit Number without Using Calculator

Welcome to a video that will show how to square any 2 digit number without the use of a calculator. The first step is to determine the distance from the number you are squaring to the nearest multiple of 10, and then step 2 add the distance to one factor and subtract the distance from […]

## Ex: Evaluate arccot(-3.6) Using a Calculator

– WE WANT TO EVALUATE ARCCOTANGENT OF -3.6, WHICH MEANS WE WANT TO DETERMINE AN ANGLE THAT HAS A COTANGENT FUNCTION VALUE OF -3.6/1. NOW, THERE ARE AN INFINITE NUMBER OF ANGLES THAT HAVE A COTANGENT FUNCTION VALUE OF -3.6, BUT THE OUTPUT OR RANGE FOR ARCCOTANGENT IS ON THE OPEN INTERVAL FROM 0 TO […]