Find all values of x such that – 6π ≤ x ≤ 6π and cos x = 0 - Mathematics

Find all values of x such that – 6π ≤ x ≤ 6π and cos x = 0

Sum

cos x = 0

cos x = `cos pi/2`

⇒ x = `(2"n" + 1) +- pi/2`

n = 0, ±1, ±2, ±3, ±4, ±5

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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 1. (i) | Page 142

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