20) A jar filled with only dimes and quarters contains a total of 23 coins. The value of all the coins in
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A polynomial can have constants, variables or exponents that can be combined using addition, subtraction, multiplication and division but not division by a variable.
: Polynomial
: Polynomial
: Polynomial
: Not Polynomial because it has a variable in division.
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The value of cos A is √(1 + x²)/ (1 - x²) /√1 + x
<h3>Trigonometric ratios</h3>
It is important to note that
sin A = opposite/ hypotenuse
cos A = adjacent/ hypotenuse
Then,
opposite =
Hypotenuse =
Let's find the adjacent side using the Pythagorean theroem
cos A = x/hypotenuse
cos A = √(1 + x²)/ (1 - x²) /√1 + x
Thus, the value of cos A is √(1 + x²)/ (1 - x²) /√1 + x
Learn more about trigonometric identities here:
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