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Ex 2.1, 2 - Find principal value of cos-1 (root 3/2) - Class 12

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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)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.