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Solve for x : cos x 3 – 1 = 0 - Mathematics

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Question

Solve for x : cos  `(x)/(3)  –1` = 0

Sum

Solution

cos`(x)/(3)` – 1 = 0

cos`(x)/(3)` = 1

`(x)/(3)` = 0°

x =0°

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Trigonometric Equation Problem and Solution
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Chapter 23: Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios] - Exercise 23 (C) [Page 298]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (C) | Q 12.02 | Page 298
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