Check sibling questions

Ex 8.3, 3 - Chapter 8 Class 10 Introduction to Trignometry (Term 1)

Last updated at May 29, 2018 by

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

This video is only available for Teachoo black users

Subscribe Now

Transcript

Ex 8.3, 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°

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.