Trigonometric Functions and Geometric Formulas
This page presents a comprehensive overview of trigonometric functions for specific angles and area formulas for various geometric shapes. It serves as a valuable reference for students studying geometry and trigonometry.
Trigonometric Values for Special Angles
The page begins by presenting a table of trigonometric function values for angles 30°, 45°, and 60°. These values are crucial for solving problems involving right triangles and are often memorized by students.
Highlight: The sine, cosine, tangent, and cotangent values for 30°, 45°, and 60° are provided in both fraction and decimal forms.
Area Formulas for Triangles
Several formulas for calculating the pole trójkąta (area of a triangle) are presented:
- Equilateral triangle: P = a²√3/4
- Right triangle: P = (1/2)ab
- Any triangle: P = (1/2)ah (where h is height)
Example: For an equilateral triangle with side length a, the area can be calculated using P = a²√3/4.
Area Formulas for Quadrilaterals
The document also includes area formulas for various quadrilaterals:
- Square: P = a² (where a is the side length)
- Rectangle: P = ab (where a and b are the side lengths)
- Rhombus: P = (1/2)d₁d₂ (where d₁ and d₂ are the diagonals)
- Trapezoid: P = (1/2)(a+b)h (where a and b are parallel sides and h is height)
Definition: The pole trójkąta prostokątnego (area of a right triangle) is calculated using the formula P = (1/2)ab, where a and b are the lengths of the two perpendicular sides.
Trigonometric Identities
Important trigonometric identities are listed, including:
- Pythagorean identity: sin²α + cos²α = 1
- Reciprocal identities: tanα · cotα = 1
These identities are fundamental in trigonometry and are used to simplify and solve complex trigonometric equations.
Vocabulary: Wzór na pole trójkąta równobocznego refers to the formula for the area of an equilateral triangle.