Question 2 - Examples - Chapter 8 Class 10 Introduction to Trignometry

Last updated at April 16, 2024 by

Example 10 - If sin 3A = cos (A - 26), find value of A - Trignometric ratios of complementry angles

Go Ad-free

Transcript

Question 2 If sin 3A = cos (A – 26°), where 3A is an acute angle, find the value of A. Given that, sin 3A = cos (A – 26°) cos (90° – 3A) = cos (A − 26°) Comparing angles 90 – 3A = A − 26° − 3A – A = – 26 – 90 − 4A = − 116 A = (−116)/(−4) A = 29 Hence, A = 29°

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

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