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)
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.
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