Question 1 - Examples - Chapter 8 Class 10 Introduction to Trignometry

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Example 9 - Evaluate tan 65 / cot 25 - Chapter 8 Class 10 - Examples

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Question 1 Evaluate tan 65° /cot 25° . Now, tan 65 / cot 25 We know that 25 + 65 = 90 Hence, 65 = 90 - 25 So, we put tan 65 as tan (90 - 25) = ( tan (90 - 25))/cot 25 Now, we know that tan (90 - θ) = cot θ = cot 25 /cot 25 = 1

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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