Скачать или смотреть PRAGATI BATCH 1.0 |class10 maths trigonometry| EXERCISE 8.3 | LECTURE 10 | BY SHYAM SINGHAL 🔥

PRAGATI BATCH 1.0 |class10 maths trigonometry| EXERCISE 8.3 | LECTURE 10 | BY SHYAM SINGHAL 🔥


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Trigonometry – Class 10 (CBSE Board)

Meaning:
The word Trigonometry comes from the Greek words ‘Tri’ (three), ‘Gon’ (sides), and ‘Metron’ (measure). It is the study of the relationship between the angles and sides of a right-angled triangle.

Key Concepts in Class 10 Trigonometry

Trigonometric Ratios (T-ratios):
Defined for a right-angled triangle with angle θ:

sin θ = Perpendicular / Hypotenuse

cos θ = Base / Hypotenuse

tan θ = Perpendicular / Base

cosec θ = Hypotenuse / Perpendicular

sec θ = Hypotenuse / Base

cot θ = Base / Perpendicular

Perpendicular = side opposite the angle
Base = side adjacent to the angle
Hypotenuse = longest side (opposite the right angle)

Trigonometric Ratios of Specific Angles:
Ratios for standard angles – 0°, 30°, 45°, 60°, 90° – are to be memorized.

Trigonometric Identities (Very Important):

sin²θ + cos²θ = 1

1 + tan²θ = sec²θ

1 + cot²θ = cosec²θ