Definition: A trigonometry function is defined as a function with an angle. The angle is often called (theta noted ” θ “) or ( phi noted ” φ “). Also, You should note that the angles can be determined in Degrees(example: 300, 900) or in Radians(rad ).
In a right triangle, there are six(6) possible trigonometry functions or ratios.
- Sine function : sin(θ)
- Cosine function : cos(θ)
- Tangent function : tan(θ)
- Secant function: sec(θ)
- Cosecant function : csc(θ)
- Cotangent function : cot(θ)
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Calculation Example.
Cases1. Solving an angle knows three sides: hypotenuse, adjacent, and opposite.
a) Example 1: Solve cos(480) with hypotenuse = 3, adjacent = 2.007 and opp0site = 2.29.
Solve: cos(480) , sin(480) , tan(480) , csc(480) , sec(480) , cot(480)
Solution:
In this example, we will be looking at the right triangle as the reference in order to determine the value of each specific angle. See below ⇓
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Unit Circle?
In mathematics, a unit circle is a circle of unit radius—that is, a radius of 1.
Download the Unit Circle and all Fundamentals angles such as π/2 rad, π/3 rad, and more…