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Опубликовано: 16 Июнь 2026
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Maths Class 10
Chapter- 8, Introduction to Trigonometry
Extra Question from Trigonometry

Prove that- sec A (1 – sin A) (sec A + tan A) = 1

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Extra Questions (Most Important Questions)
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Chapter lol 1: Real Numbers
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Chapter 2: Polynomials
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Chapter 3: Pair of linear Equations in Two Variables
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Chapter 4: Quadratic Equations
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Chapter 5: Arithmetic Progression
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Chapter 6: Triangles
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Chapter 7: Coordinate Geometry
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Chapter 8: Introduction to Trigonometry
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Chapter 9: Some Applications of Trigonometry
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Chapter 10: Circles
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Chapter 11: Constructions
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Chapter 12: Area Related to Circles
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Chapter 13: Surface Areas and Volumes
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Chapter 14: Statistics
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Chapter-15: Probability
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Deepak Rajoria
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YOUR QUERIES :
What are Trigonometric Ratios
Different types of Trigonometric Ratios
Trignometric Identities
Sin2 theta + Cos2 theta =1
1 - sin2 Thera = Cos2 theta
1- cos2 theta = sin2 theta
1+ tan2 theta = Sec2 theta
Sec2 theta - tan2 thetaqq = 1
Sec2 theta - 1 = tan2 theta
1+ cot2 theta = cosec2 theta
Cosec2 theta - cot2 theta = 1
Cosec2 theta - 1 = cot2 theta
Sun (90-theta) = cos theta
Cos (90- theta) = sin theta
Tan (90- theta) = cot theta
Cot (90-theta) = tan theta
Sec (90 - theta) cosec theta
Cosec (90 - theta) = sec theta
Sin theta / cos theta = tan theta
Cos theta / sin theta = cot theta
How to find the value of theta