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Solve the following equation for A, if sec 2A = 2 - Mathematics

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Sum

Solve the following equation for A, if sec 2A = 2

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Solution

According to the question,
We have,

sec 2A = 2
sec 2A = sec 60°
2A = 60°
A = 30°.

Concept: 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 297]

Q 1.4 Q 1.3 Q 1.5

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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 1.4 | Page 297

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Solve the following equation for A, if sec 2A = 2 - Mathematics

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