CLASS_11_MATHS_SOLUTIONS_NCERT

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Class XI Chapter 3 – Trigonometric Functions Maths ______________________________________________________________________________ 2sin 4x cos 4x2sin 2x cos 2x sin8xsin 4xR.H.S Question 14: 2 Prove that sin 2x 2sin 4x sin 6x 4cos xsin 4x Solution 14: L.H.S. sin 2x 2sin 4x sin6x sin 2x sin 6x 2sin 4x 2x 6x 2x 6x 2sin cos 2sin 4x 2 2 A B A B sin A sin B 2sin cos 2 2 2sin 4x cos 2x 2sin 4x 2sin 4xcos2x 2sin 4x 2sin 4x cos 2x1 2 2sin 4x 2cos x<strong>11</strong> 2sin 4x 2cos 2 4cos R.H.S. xsin 2 4x x Question 15: Prove that cot 4x sin 5x sin 3x cot x sin 5x sin 3x Solution 15: L.H.S cot 4x sin 5x sin 3x cot 4 x 5 3 5 3 2sin x x cos x x sin 4x 2 2 A B A B sin A sin B 2sin cos 2 2 cos 4x 2sin 4xcos x sin 4x Printed from Vedantu.com. Register now to book a Free LIVE Online trial session with a Top tutor.
Class XI Chapter 3 – Trigonometric Functions Maths ______________________________________________________________________________ 2cos 4xcos x R.H.S. cot x sin 5x sin 3x cos x 5 3 5 3 2cos x x sin x x sin x 2 2 A B A B sin A sin B 2cos sin 2 2 cos x sin x 2cos 4xsin x 2cos 4 x.cos x L.H.S. = R.H.S. Question 16: Prove that Solution 16: It is known that cos9x cos5x sin 2x sin17x sin 3x cos10x A B A B A B A B cos A cos B 2sin sin , sin A sin B 2cos sin 2 2 2 2 cos9x cos5x L.H.S. sin17x sin 3x 9x 5x 9x 5x 2sin .sin 2 2 17x 3x 17x 3x 2cos .sin 2 2 2sin 7 x.sin 2x 2cos10 x.sin 7x sin 2x cos10x R.H.S. Printed from Vedantu.com. Register now to book a Free LIVE Online trial session with a Top tutor.
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Class XI Chapter 1 - Sets Maths ___
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Page 27 and 28: Class XI Chapter 1 - Sets Maths ___
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Class XI Chapter 5 - Complex Number
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Class XI Chapter 6 - Linear Inequal
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Class XI Chapter 7 - Permutation an
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Class XI Chapter 8 - Binomial Theor
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Class XI Chapter 9 - Sequences and
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Class XI Chapter 10 - Straight Line
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Class XI Chapter 11 - Conic Section
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Class XI Chapter 12 - Introduction
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Class XI Chapter 13 - Limits and De
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Class XI Chapter 14 - Mathematical
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Class XI Chapter 15 - Statistics Ma
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