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Sine and Cosine

Consider a right triangle BAC: Hypotenuse:, m () = a. Collet: m () = b , m () = c. Angles:, e. Based on the elements of this triangle, we can define the following trigonometric ratios: Sine of an acute angle is the ratio between the measurement of the opposite side of that angle and the hypotenuse.
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Stepped Systems (continued)

II) The number of equations is less than the number of unknowns (m Example: Step 1: We nullify all coefficients of the 1st unknown from the 2nd equation: We exchange the 2nd equation for the sum of the product of the 1st equation for -2 with the 2nd. Equation: We exchange the 3rd equation for the sum of the product of the 1st equation by -1 with the 3rd equation: Step 2: We cancel the coefficients of the 2nd unknown from the 3rd equation: We exchange the 3rd equation for the sum of the product of the 2nd equation for - 3 with the 3rd equation The system is staggered.
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Elementary School

In this section you will find teaching materials for elementary school. They are available from basic to advanced materials from 9th grade. Choose the desired material and good studies! Fractions What is a fraction? The Meaning of a Fraction Reading a Fraction, Classifying Fractions Equivalent Fractions Fractional Numbers Adding and Subtracting Fractional Numbers Multiplication and Division of Fractional Numbers Divisibility Divisibility Criteria Prime Numbers Breakdown of Prime Factor a maximum common divisor number (M.
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Challenge 122

How much should the jeweler pay? Difficulty level: A jeweler and the innkeeper argue. The jeweler promised to pay the owner of the inn $ 20.00 for the accommodation if he sold the jewelry for $ 100.00 and would pay $ 35.00 if selling the jewelry for $ 200.00. Knowing that the jeweler ended up selling everything for $ 140.00, how much should he pay the innkeeper?
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Complex numbers

Let's consider the equation x² - 2x + 5 = 0: We know that the number does not belong to the set of real numbers, since there is no squared number that results in -1. For the above equation to have a solution, we have to extend the set of real numbers to get a new set, called the set of complex numbers and represented by.
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Challenge 42

Row of Bottles Difficulty Level: There are nine bottles in a row. The first five are full of beer and the last four empty. Moving only two bottles, like making the row with alternately full and empty bottles. Challenge 41 Solve the equation Challenge Index Next >> Challenge 43 How Many Eggs a Year?
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