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Sin, Cos, and Tan Values

September 27, 2023
written by Rida Mirza

In mathematics, to gain a deep understanding of sin cos and tan Values of it is important to become familiar with a concept known as the unit circle. The unit circle is a circle with a radius of 1 unit, centered at the origin (0,0) on the Cartesian plane.

In this section, we will explore the mathematical aspects of Sin Cos Tan Values, providing you with a comprehensive understanding of these trigonometric functions.

Sin Cos and Tan Values

Sin Value (Sinθ)

It represents the y-coordinate of the point where a ray originating from the origin intersects the unit circle at an angle θ.

In mathematical terms, Sinθ = y/r, where y is the y-coordinate of the point of intersection, and r is the radius of the unit circle.

Cos Value (Cosθ)

Cosθ, on the other hand, signifies the x-coordinate of the same point where the ray intersects the unit circle.

Cosθ = x/r, where x is the x-coordinate of the point of intersection.

Tan Value (Tanθ)

Tanθ is the tangent of the angle θ, which is equal to Sinθ/Cosθ.

In mathematical terms, Tanθ = Sinθ / Cosθ.

Table of Sin, Cos, and Tan Values

The table is showing the values of sin, cos, tan values at different angles.

Angle (θ)SinθCosθTanθ

In this table, we’ve calculated the Sin, Cos, and Tan values for angles of 0°, 30°, 45°, 60°, and 90°. These values serve as reference points when dealing with trigonometric calculations.

Real-Life Applications

Sin, Cos, and Tan values find applications in various real-life scenarios. For instance:

  • Architects and engineers use these values to design stable structures and calculate load-bearing capacities.
  • Astronomers use them to determine the positions of celestial bodies.
  • In navigation, sailors rely on these functions to determine their location based on celestial observations.
  • Animators and game developers employ trigonometry to create realistic animations and simulate natural movements.


How do I calculate Sin, Cos, and Tan values for angles not listed in the table?

You can use a scientific calculator or trigonometric functions in software like Excel or Python to calculate Sin, Cos, and Tan values for any angle.

Are there any restrictions on the angles for which Sin, Cos, and Tan are defined?

No, Sin, Cos, and Tan functions are defined for all real numbers. However, their values may repeat periodically due to their periodic nature.

How do Sin, Cos, and Tan values relate to right triangles?

In a right triangle, Sinθ represents the ratio of the side opposite the angle θ to the hypotenuse, Cosθ represents the ratio of the adjacent side to the hypotenuse, and Tanθ is the ratio of the opposite side to the adjacent side.