Ex 2.1, 2
Find the principal value of cos-1 (√3/2)
Let y = cos-1 √3/2
cos y = √3/2
cos y = cos 𝝅/𝟔
∴ y = 𝝅/𝟔
Since Range of cos-1 is [0, 𝜋]
Hence, Principal Value is 𝝅/𝟔
(Since cos 𝜋/6 = √3/2)
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.