Question 3 - Trignometric ratios of complementry angles - Chapter 8 Class 10 Introduction to Trignometry

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Example 11 - Express cot 85 + cos 75 in terms of ratios - Examples

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Question 3 Express cot 85° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°. cot 85° + cos75° = cot (90° − 5) + cos (90° − 15°) = tan 5° + sin 15° Hence required value is tan 5° + sin 15°

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo