Question 1 (ii) - Ex 8.3 - Chapter 8 Class 10 Introduction to Trignometry

Last updated at April 16, 2024 by

Ex 8.4, 3 - Chapter 8 Class 10 Introduction to Trignometry - Part 2

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Ex 8.3, 3 Evaluate : sin 25 cos 65 + cos 25 sin 65 sin 25 cos 65 + cos 25 sin 65 = sin (90 65) cos 65 + cos (90 65) sin 65 = cos 65 cos 65 + sin 65 sin 65 = cos265 + sin265 = 1 Hence, sin65 cos 65 + cos 25 sin 65 = 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, Social Science, Physics, Chemistry, Computer Science at Teachoo.