Table of trigonometric functions

Oct 13, 2025 by wbrum.org 51 views

Understanding the Problem

The given problem involves a table with angles in degrees and a function f(x) that needs to be evaluated at these angles. The table is incomplete, and we are required to complete it by finding the values of f(x) for each angle.

The Function f(x)

Before we proceed, let's understand the function f(x). Although the function is not explicitly defined, we can assume it to be a trigonometric function, such as sine, cosine, or tangent, based on the given angles. For the purpose of this problem, let's assume f(x) to be the sine function.

The Table

x	-180°	-135°	-90°	-45°	0°	45°	90°
f(x)

Completing the Table

To complete the table, we need to find the values of f(x) for each angle. We can use the unit circle or trigonometric identities to find these values.

-180°

At -180°, the sine function is equal to 0. This is because the sine function is an odd function, and sin(-x) = -sin(x). Therefore, sin(-180°) = -sin(180°) = 0.

-135°

At -135°, the sine function is equal to -1/√2. This can be found using the unit circle or trigonometric identities.

-90°

At -90°, the sine function is equal to 0. This is because the sine function is an odd function, and sin(-x) = -sin(x). Therefore, sin(-90°) = -sin(90°) = 0.

-45°

At -45°, the sine function is equal to -1/√2. This can be found using the unit circle or trigonometric identities.

0°

At 0°, the sine function is equal to 0. This is because the sine function is an even function, and sin(x) = sin(-x). Therefore, sin(0°) = sin(-0°) = 0.

45°

At 45°, the sine function is equal to 1/√2. This can be found using the unit circle or trigonometric identities.

90°

At 90°, the sine function is equal to 1. This can be found using the unit circle or trigonometric identities.

The Completed Table

x	-180°	-135°	-90°	-45°	0°	45°	90°
f(x)	0	-1/√2	0	-1/√2	0	1/√2	1

Discussion

The completed table shows the values of the sine function for each angle. This can be used to understand the behavior of the sine function and its relationship with the unit circle.

Conclusion

In conclusion, we have completed the table by finding the values of the sine function for each angle. This has helped us understand the behavior of the sine function and its relationship with the unit circle.

Tips and Tricks

Use the unit circle to find the values of trigonometric functions.
Use trigonometric identities to simplify expressions and find values of trigonometric functions.
Practice, practice, practice! The more you practice, the better you will become at finding values of trigonometric functions.

Common Mistakes

Not using the unit circle to find values of trigonometric functions.
Not using trigonometric identities to simplify expressions and find values of trigonometric functions.
Not practicing enough to become proficient in finding values of trigonometric functions.

Real-World Applications

The sine function is used in many real-world applications, such as physics, engineering, and computer science.
The sine function is used to model periodic phenomena, such as sound waves and light waves.
The sine function is used to calculate distances and angles in navigation and surveying.

References

"Trigonometry" by Michael Corral
"Calculus" by Michael Spivak
"Mathematics for Computer Science" by Eric Lehman and Tom Leighton

Glossary

Sine function: a trigonometric function that relates the ratio of the length of the side opposite a given angle to the length of the hypotenuse of a right triangle.
Unit circle: a circle with a radius of 1 that is centered at the origin of a coordinate plane.
Trigonometric identities: equations that relate the values of trigonometric functions to each other.

Index

Sine function: 1
Unit circle: 1
Trigonometric identities: 1

Appendix

Table of trigonometric functions: a table that shows the values of trigonometric functions for common angles.
List of trigonometric identities: a list of equations that relate the values of trigonometric functions to each other.
Q&A: Redrawing the Table in Your Answer Book and Completing It ================================================================

Frequently Asked Questions

Q: What is the purpose of the table in the problem?

A: The table is used to evaluate the function f(x) at different angles. The function f(x) is assumed to be the sine function.

Q: How do I complete the table?

A: To complete the table, you need to find the values of the sine function for each angle. You can use the unit circle or trigonometric identities to find these values.

Q: What is the unit circle?

A: The unit circle is a circle with a radius of 1 that is centered at the origin of a coordinate plane. It is used to find the values of trigonometric functions.

Q: What are trigonometric identities?

A: Trigonometric identities are equations that relate the values of trigonometric functions to each other. They can be used to simplify expressions and find values of trigonometric functions.

Q: How do I use the unit circle to find values of trigonometric functions?

A: To use the unit circle, you need to plot the angle on the unit circle and find the corresponding value of the trigonometric function. You can use the coordinates of the point on the unit circle to find the value of the trigonometric function.

Q: What are some common trigonometric identities?

A: Some common trigonometric identities include:

sin(x) = sin(-x)
cos(x) = cos(-x)
tan(x) = tan(-x)
sin^2(x) + cos^2(x) = 1
tan(x) = sin(x)/cos(x)

Q: How do I use trigonometric identities to simplify expressions?

A: To use trigonometric identities to simplify expressions, you need to identify the trigonometric functions in the expression and apply the corresponding identity. For example, if you have the expression sin(x) + cos(x), you can use the identity sin^2(x) + cos^2(x) = 1 to simplify it.

Q: What are some real-world applications of trigonometric functions?

A: Trigonometric functions have many real-world applications, including:

Physics: trigonometric functions are used to model periodic phenomena, such as sound waves and light waves.
Engineering: trigonometric functions are used to calculate distances and angles in navigation and surveying.
Computer Science: trigonometric functions are used in graphics and game development to create 3D models and animations.

Q: How do I practice finding values of trigonometric functions?

A: To practice finding values of trigonometric functions, you can use online resources, such as trigonometric function calculators, or work on problems from a trigonometry textbook.

Q: What are some common mistakes to avoid when finding values of trigonometric functions?

A: Some common mistakes to avoid when finding values of trigonometric functions include:

Not using the unit circle to find values of trigonometric functions.
Not using trigonometric identities to simplify expressions and find values of trigonometric functions.
Not practicing enough to become proficient in finding values of trigonometric functions.

Conclusion

In conclusion, the table in the problem is used to evaluate the function f(x) at different angles. To complete the table, you need to find the values of the sine function for each angle. You can use the unit circle or trigonometric identities to find these values. Trigonometric functions have many real-world applications, including physics, engineering, and computer science. To practice finding values of trigonometric functions, you can use online resources or work on problems from a trigonometry textbook.

Glossary

Sine function: a trigonometric function that relates the ratio of the length of the side opposite a given angle to the length of the hypotenuse of a right triangle.
Unit circle: a circle with a radius of 1 that is centered at the origin of a coordinate plane.
Trigonometric identities: equations that relate the values of trigonometric functions to each other.

Index

Sine function: 1
Unit circle: 1
Trigonometric identities: 1

Appendix

Table of trigonometric functions: a table that shows the values of trigonometric functions for common angles.
List of trigonometric identities: a list of equations that relate the values of trigonometric functions to each other.