Prove identity using angle, Prove double angle property of cos and tan, Hindi, Urdu, Class 11 & 12

This video explains how to prove identities using angle and how to prove the double-angle property of cosine and tangent in a simple style specially designed for Hindi Urdu medium students of Class 11 & 12. The lesson focuses on understanding how angle values affect trigonometric functions and how different identities transform when the angle changes. Each concept is explained in easy English words so Hindi Urdu students can follow without difficulty.

You will learn how to take a given identity, simplify it step by step, and use angle relationships to show that both sides are equal. The video also guides you through the complete method of proving double-angle properties of cos and tan, showing how the expressions expand, how terms combine, and how the final result is obtained. Every step is demonstrated with clear reasoning so you understand not only the procedure but also the logic behind it.

Examples include proving identities by selecting a starting side, using angle simplification, applying basic trigonometry rules, and transforming expressions into recognizable forms. The explanation helps you build confidence for solving Class 11 & 12 trigonometry questions, proving identities, and working with angle-based transformations.

This video is ideal for students who want strong conceptual understanding of identity proofs, double-angle properties, and angle manipulation in trigonometry. With slow explanations and easy language, you can revise, practice, and strengthen your math foundations effectively.