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Class notes

Class 10 Trigonometry Complete Notes & Formulas

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Sixth Year / 12th Grade
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Trigonometry ke complete easy-to-understand notes, jisme 6 trigonometric ratios, standard values, important identities, reciprocal formulas, complementary angles, ASTC rule, important formulas aur solved 3-4-5 triangle example cover kiya gaya hai. Class 10 Maths aur exam revision ke liye useful. Notes Hindi + English format mein hain.

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TRIGONOMETRY
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.

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School year
5
Uploaded on
September 25, 2026
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3
Written in
2026/2027
Type
Class notes
Professor(s)
Aashutosh tiwari
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Class 10
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