Graph the parabola , and find the focus point and directrix line.
Table of contents
- 0. Functions7h 52m
- Introduction to Functions16m
- Piecewise Functions10m
- Properties of Functions9m
- Common Functions1h 8m
- Transformations5m
- Combining Functions27m
- Exponent rules32m
- Exponential Functions28m
- Logarithmic Functions24m
- Properties of Logarithms34m
- Exponential & Logarithmic Equations35m
- Introduction to Trigonometric Functions38m
- Graphs of Trigonometric Functions44m
- Trigonometric Identities47m
- Inverse Trigonometric Functions48m
- 1. Limits and Continuity2h 2m
- 2. Intro to Derivatives1h 33m
- 3. Techniques of Differentiation3h 18m
- 4. Applications of Derivatives2h 38m
- 5. Graphical Applications of Derivatives6h 2m
- 6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
- 7. Antiderivatives & Indefinite Integrals1h 26m
- 8. Definite Integrals4h 44m
- 9. Graphical Applications of Integrals2h 27m
- 10. Physics Applications of Integrals 3h 16m
- 11. Integrals of Inverse, Exponential, & Logarithmic Functions2h 34m
- 12. Techniques of Integration7h 39m
- 13. Intro to Differential Equations2h 55m
- 14. Sequences & Series5h 36m
- 15. Power Series2h 19m
- 16. Parametric Equations & Polar Coordinates7h 58m
16. Parametric Equations & Polar Coordinates
Conic Sections
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Given the hyperbola 25x2−9y2=1, find the length of the a-axis and the b-axis.
A
a=25,b=9
B
a=9,b=25
C
a=5,b=3
D
a=3,b=5

1
Step 1: Recognize the standard form of the hyperbola equation: \( \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 \). Here, \( a^2 = 25 \) and \( b^2 = 9 \).
Step 2: To find the values of \( a \) and \( b \), take the square root of \( a^2 \) and \( b^2 \). This gives \( a = \sqrt{25} \) and \( b = \sqrt{9} \).
Step 3: The length of the \( a \)-axis (transverse axis) is calculated as \( 2a \), since the hyperbola is centered at the origin and symmetric about the x-axis.
Step 4: The length of the \( b \)-axis (conjugate axis) is calculated as \( 2b \), since the hyperbola is symmetric about the y-axis.
Step 5: Substitute the values of \( a \) and \( b \) into the formulas for the axis lengths to determine the final lengths of the \( a \)-axis and \( b \)-axis.
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