Sin Cos Tan – Formula, Definition with Examples
11 minutes read
Created: January 11, 2024
Last updated: January 11, 2024
Welcome to Brighterly, your digital learning platform where math becomes an exciting adventure! Today we will delve into an intriguing concept of mathematics – trigonometry, through the lenses of Sin, Cos, and Tan. These are the fundamental building blocks that make understanding complex mathematical phenomena as easy as pie. Our mission at Brighterly is to illuminate your path of learning, so we promise to explain these concepts with simplicity, reallife examples, and engaging visuals.
Have you ever wondered how engineers construct skyscrapers or how pilots navigate their flights accurately? The magic lies within trigonometry and, more specifically, the Sin, Cos, and Tan functions. These trigonometric functions help decipher the relationships between angles and distances, thereby providing a bridge that connects the angles of a triangle to the lengths of its sides. Buckle up for an enlightening journey as we decipher the magic of Sin Cos Tan!
What is Sin Cos Tan in Trigonometry?
Welcome to the enchanting world of trigonometry, the branch of mathematics that studies relationships involving lengths and angles of triangles. At the heart of this intriguing subject are three primary functions: Sine (sin), Cosine (cos), and Tangent (tan). These trigonometric functions create a connection between the angles of a triangle and the lengths of its sides. Let’s journey into this mathematical realm and uncover the beauty of Sin Cos Tan!
When we talk about rightangled triangles, we see they consist of a right angle (90 degrees), a hypotenuse (the longest side), and two other sides. The functions Sin, Cos, and Tan are ratios that relate the lengths of these sides to each other. Simply put, they serve as a bridge, connecting the realm of angles to the world of lengths. So, whenever you hear the terms Sin, Cos, or Tan, know that they help us decipher the hidden relationships within a rightangled triangle!
These functions are extensively used in a range of fields, including physics, engineering, computer science, and more. They form the basis for understanding waveforms, oscillations, rotations, and many other phenomena that rely on periodicity or circular motion. However, our focus at Brighterly is to provide an easytounderstand introduction to these magical mathematical terms for our young learners. So, let’s dive deeper!
Sin Cos Tan Values
Imagine standing on top of a hill and gazing at the horizon. The steepness of the hillside, the height you’ve climbed, and the distance to the horizon form a rightangled triangle. The angles at which you gaze represent the functions Sin, Cos, and Tan.
For any given angle in a rightangled triangle:

The Sine of the angle is the ratio of the length of the side opposite the angle to the length of the hypotenuse.

The Cosine of the angle is the ratio of the length of the side adjacent to the angle to the length of the hypotenuse.

The Tangent of the angle is the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle.
The values of these functions can be determined using trigonometric ratios, the unit circle, or the sine, cosine, and tangent tables. These are tools that are going to help us reveal the world of Sin Cos Tan!
Sin Cos Tan Formulas
Understanding the formulas of Sin, Cos, and Tan is like learning the secret spells of the mathematical world! Here are those magical formulas:
 Sin θ = Opposite/Hypotenuse
 Cos θ = Adjacent/Hypotenuse
 Tan θ = Opposite/Adjacent
These formulas hold the key to solving a multitude of problems involving rightangled triangles. Remember that ‘θ’ represents the angle you’re investigating, and the terms ‘opposite,’ ‘adjacent,’ and ‘hypotenuse’ are in relation to this angle. If you remember these formulas, you will be able to solve almost any trigonometry problem you encounter!
Sin Cos Tan Table
The Sin Cos Tan Table, also known as Trigonometric Table, is like a magic mirror reflecting the values of Sin, Cos, and Tan for various angles. It’s an incredibly handy tool for solving trigonometry problems. Usually, the table includes the angles from 0 to 90 degrees, but you can calculate the functions for any angle using the principles of periodicity and symmetry.
Sin Cos Tan Chart
A Sin Cos Tan Chart is another enchanting tool in trigonometry, illustrating how the values of these functions vary with the angle. The chart usually depicts the values from 0 to 360 degrees, exhibiting the periodic nature of these functions. It’s a beautiful graphical representation that can help you visualize the changes in Sin, Cos, and Tan as the angle increases or decreases.
How to find Sin Cos Tan Values?
To find Sin, Cos, and Tan values, you can use the aforementioned formulas, the Sin Cos Tan Table, or the Unit Circle. However, it’s also possible to find these values using a scientific calculator. The key to accurately determining these values is to remember the basic principles of each function and their relation to the angles and sides of a rightangled triangle.
Tips to Remember Sin Cos Tan Table
An easy way to remember the Sin Cos Tan Table is by using the SOHCAHTOA method. This simple mnemonic reminds us that:
 SOH: Sin = Opposite/Hypotenuse
 CAH: Cos = Adjacent/Hypotenuse
 TOA: Tan = Opposite/Adjacent
It’s a quick and clever way to remember the formulas and their respective functions!
Sin Cos Tan on Unit Circle
The Unit Circle, a circle with a radius of 1, is like a map for the trigonometric functions. It beautifully depicts how Sin, Cos, and Tan vary with angles and provides an intuitive way to understand and calculate these values. In the Unit Circle, Cos represents the xcoordinate, and Sin represents the ycoordinate of a point on the circle. Tan, being Sin/Cos, gives the slope of the line joining the origin to the point.
Examples on Sin Cos Tan
Let’s take a few examples to understand the application of Sin, Cos, and Tan better:

Suppose in a rightangled triangle, the angle is 30 degrees, and the hypotenuse is 2 units. Then, the opposite side (Sin 30) would be 1 unit, and the adjacent side (Cos 30) would be √3 units.

In another example, if the angle is 45 degrees, the lengths of the opposite side (Sin 45) and the adjacent side (Cos 45) would be equal, both being 1/√2 units for a unit hypotenuse.
The more examples you practice, the more comfortable you will become with these functions!
Practice Questions on Sin Cos Tan
After understanding the basics of Sin, Cos, and Tan, it’s time for some practice. Try to solve these questions:
 In a rightangled triangle with a 60degree angle and hypotenuse of 10 units, what are the lengths of the opposite and adjacent sides?
 Find the Sin, Cos, and Tan values for an angle of 90 degrees.
 If in a rightangled triangle, the lengths of the opposite and adjacent sides are 3 and 4 units respectively, what would be the angle?
Conclusion
We hope this fascinating exploration into the world of Sin, Cos, and Tan has shed light on the captivating subject of trigonometry. It is important to remember that these mathematical tools are not just theoretical constructs but realworld enablers, from designing video games to predicting astronomical events.
At Brighterly, we strive to make complex concepts accessible and exciting. Just as we’ve demystified Sin, Cos, and Tan today, our vision is to help you unravel the mysteries of all mathematical concepts. Practice, curiosity, and a bit of creativity are the stepping stones on this beautiful journey of learning. And remember, every mathematical concept you master is another light turned on in the grand hallway of knowledge. So, keep those lights turning on!
Frequently Asked Questions on Sin Cos Tan
What are Sin, Cos, and Tan?
Sin, Cos, and Tan are three fundamental trigonometric functions that define the relationship between the angles of a triangle and the lengths of its sides. Sin, or Sine, corresponds to the ratio of the length of the side opposite to an angle to the length of the hypotenuse. Cos, or Cosine, corresponds to the ratio of the length of the side adjacent to an angle to the length of the hypotenuse. Tan, or Tangent, corresponds to the ratio of the length of the side opposite an angle to the length of the side adjacent to it.
What is the Sin Cos Tan Table?
The Sin Cos Tan Table is an extremely valuable tool in trigonometry. It is a tabular representation that gives the values of Sin, Cos, and Tan functions for different angles. This table usually lists the angles from 0 to 90 degrees and can help in quickly solving trigonometry problems without the need for a calculator.
What are the formulas for Sin, Cos, and Tan?
The formulas for Sin, Cos, and Tan in a rightangled triangle are defined in relation to an angle ‘θ’:


Sin θ = Opposite/Hypotenuse: This formula tells us that the Sine of an angle is the ratio of the length of the side opposite to that angle to the length of the hypotenuse.

Cos θ = Adjacent/Hypotenuse: This formula signifies that the Cosine of an angle is the ratio of the length of the side adjacent to that angle to the length of the hypotenuse.

Tan θ = Opposite/Adjacent: This formula conveys that the Tangent of an angle is the ratio of the length of the side opposite to that angle to the length of the side adjacent to it.

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