Complete Notes • Formulas • Standard Values • Exam Revision
1. Trigonometry kya hai?
Trigonometry mathematics ki woh branch hai jisme triangle ke angles aur sides ke relationship ka study kiya jata
hai.
Right-angled triangle: Hypotenuse (H) = 90° ke opposite side; Perpendicular/Opposite (P) = diye gaye angle
ke opposite side; Base/Adjacent (B) = diye gaye angle ke paas wali side.
6 Trigonometric Ratios
Ratio Formula
sin θ P/H
cos θ B/H
tan θ P/B
cosec θ H/P
sec θ H/B
cot θ B/P
Reciprocal relations: cosec θ = 1/sin θ, sec θ = 1/cos θ, cot θ = 1/tan θ.