Question 3 - sin 90 - θ, cos 90 - θ formula - Chapter 8 Class 10 Introduction to Trignometry

Last updated at April 16, 2024 by

Ex 8.3, 3 - If tan 2A = cot (A - 18), find value of A. - Ex 8.3

Transcript

Question 3 If tan 2A = cot (A – 18°), where 2A is an acute angle, find the value of A. tan 2A = cot (A – 18°) cot (90 – 2A) = cot (A – 18°) Comparing angles 90 – 2A = A – 18 90 + 18 = A + 2 A 108 = 3 A 108/3= A 36 = A A = 36°

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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, Social Science, Physics, Chemistry, Computer Science at Teachoo.