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Solve for x : sin (x + 10°) = 1 2 - Mathematics

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Question

Solve for x : sin (x + 10°) = `(1)/(2)` 

Sum

Solution

sin (x + 10°) = `(1)/(2)`
sin ( x + 10°) = sin 30°
x + 10° = 30°
x = 20°

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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 12.03 | Page 298
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