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

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Question

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

Sum
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Solution

According to the question,

We have,

sec 2A = 2

sec 2A = sec 60°

2A = 60°

A = 30°

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Trigonometric Equation Problem and Solution
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Chapter 21: Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals] - EXERCISE 21 (E) [Page 328]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 21 Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals]
EXERCISE 21 (E) | Q 2. (iv) | Page 328
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