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Solve for x : 2 cos 3x - 1 = 0 - Mathematics

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प्रश्न

Solve for x : 2 cos 3x - 1 = 0

योग

उत्तर

2 cos 3x – 1 = 0
cos 3x = `(1)/(2)`
3x = 60°
x = 20°

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Trigonometric Equation Problem and Solution
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अध्याय 23: Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios] - Exercise 23 (C) [पृष्ठ २९८]

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सेलिना Concise Mathematics [English] Class 9 ICSE
अध्याय 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (C) | Q 12.01 | पृष्ठ २९८
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