All Algebra II Resources
例子问题tions
例子问题tion #1 :Hyperbolic Functions
Which of the following equations represents a vertical hyperbola with a center ofand asymptotes at?
First, we need to become familiar with the standard form of a hyperbolic equation:
The center is always at. This means that for this problem, the numerators of each term will have to containand.
To determine if a hyperbola opens vertically or horizontally, look at the sign of each variable. A vertical parabola has a positiveterm; a horizontal parabola has a positiveterm. In this case, we need a vertical parabola, so theterm will have to be positive.
(NOTE: If both terms are the same sign, you have an ellipse, not a parabola.)
抛物线的渐近线总是发现the equation, whereis found in the denominator of theterm andis found in the denominator of theterm. Since our asymptotes are, we know thatmust be 4 andmust be 3. That means that the number underneath theterm has to be 16, and the number underneath theterm has to be 9.
例子问题tion #1 :Hyperbolic Functions
What is the shape of the graph depicted by the equation:
Circle
Hyperbola
Parabola
Oval
Hyperbola
The standard equation of a hyperbola is:
例子问题tion #3 :Hyperbolic Functions
Express the following hyperbolic function in standard form:
我n order to express the given hyperbolic function in standard form, we must write it in one of the following two ways:
From our formulas for the standard form of a hyperbolic equation above, we can see that the term on the right side of the equation is always 1, so we must divide both sides of the given equation by 52, which gives us:
Simplifying, we obtain our final answer in standard form:
例子问题tion #4 :Hyperbolic Functions
Which of the following answers best represent?
The correct definition of hyperbolic sine is:
Therefore, by multiplying 2 by both sides we get the following answer,
例子问题tion #5 :Hyperbolic Functions
Which of the following best represents, if the value ofis zero?
Find the values of hyperbolic sine and cosine when x is zero. According to the properties:
Therefore:
例子问题tion #6 :Hyperbolic Functions
What is the value of?
The hyperbolic tangent will need to be rewritten in terms of hyperbolic sine and cosine.
According to the properties:
Therefore:
例子问题tion #7 :Hyperbolic Functions
Simplify:
The following is a property of hyperbolics that is closely similar to the problem.
We will need to rewrite this equation by taking a negative one as the common factor, and divide the negative one on both sides.
Substitute the value into the problem.
例子问题tion #8 :Hyperbolic Functions
Which of the following is the correct expression for a hyperbola that is shiftedunits up andto the right of?
The parent function of a hyperbola is represented by the functionwhereis the center of the hyperbola. To shift the original function up bysimply add. To shift it to the righttake away.
例子问题tion #9 :Hyperbolic Functions
Find the foci of the hyperbola:
Write the standard forms for a hyperbola.
OR:
The standard form is given in the second case, which will have different parameters compared to the first form.
Center:
Foci:, where
我dentify the coefficientsand substitute to find the value of.
The answer is:
例子问题tion #10 :Hyperbolic Functions
Given the hyperbola, what is thevalue of the center?
我n order to determine the center, we will first need to rewrite this equation in standard form.
我solate 41 on the right side. Subtractand addon both sides.
The equation becomes:
Group the x and y terms. Be careful of the negative signs.
Pull out a common factor of 4 on the second parentheses.
Complete the square twice. Divide the second term of each parentheses by two and square the quantity. Add the terms on both sides.
This equation becomes:
Factorize the left side and simplify the right.
Divide both sides by nine.
The equation is now in the standard form of a hyperbola.
The center is at:
The answer is: