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Solve for x : cos ( x 2 + 10 ° ) = √ 3 2 - Mathematics

Sum

Solve for x : cos `(x/(2)+10°) = (sqrt3)/(2)`

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Solution

cos `( x/2 + 10°) = (sqrt3)/(2)`

cos `( x/2 + 10°)` = cos 30°

`(x)/(2)` + 10° = 30°

x = 40°

Concept: Trigonometric Equation Problem and Solution
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APPEARS IN

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 12.08 | Page 298
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