Solve for x : cos (2x - 30°) = 0 - Mathematics

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Sum

Solve for x : cos (2x - 30°) = 0

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Solution

cos (2x – 30°) = 0
cos ( 2x – 30°) = cos 90°
2x – 30° = 90°
2x = 120°
x = 60°

Concept: Trigonometric Equation Problem and Solution
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Selina Concise Mathematics Class 9 ICSE
Chapter 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (C) | Q 12.04 | Page 298
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