Скачать или смотреть Trigonometry class 10th maths

Trigonometry is a branch of mathematics that deals with the relationship between the angles and sides of a right-angled triangle. The word trigonometry comes from two Greek words:
Trigon = triangle
Metron = measurement
Right-Angled Triangle
In trigonometry, we mainly study a triangle that has one angle equal to 90°.
The sides of a right-angled triangle are:
Hypotenuse – the longest side (opposite the right angle)
Perpendicular – the side opposite to the angle of interest
Base – the side adjacent to the angle of interest
Trigonometric Ratios
There are six trigonometric ratios:
Ratio Name
Formula
sin θ
Perpendicular / Hypotenuse
cos θ
Base / Hypotenuse
tan θ
Perpendicular / Base
cosec θ
1 / sin θ
sec θ
1 / cos θ
cot θ
1 / tan θ
Trigonometric Identities
These are equations that are always true, such as:
sin²θ + cos²θ = 1
1 + tan²θ = sec²θ
1 + cot²θ = cosec²θ
Standard Angles
The values of trigonometric ratios are usually learned for: 0°, 30°, 45°, 60°, and 90°
Applications of Trigonometry
Trigonometry is used in:
Finding heights and distances
Engineering and architecture
Astronomy
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