Find the principle value of cos-1(12) - Mathematics

Find the principal value of `cos^-1 (1/2)`

Sum

Let `cos^-1 (1/2)` = π

⇒ cos π = `1/2` = `cos pi/3`

⇒ π = `pi/3`

⇒ `cos^-1 (1/2) = pi/3`

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The Cosine Function and Inverse Cosine Function

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Chapter 4: Inverse Trigonometric Functions - Exercise 4.2 [Page 142]

Chapter 4 Inverse Trigonometric Functions
Exercise 4.2 | Q 4 | Page 142

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