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Question
Solve the following equation for A, if 2cos2A = 1
Sum
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Solution
2 cos 2 A = 1
cos 2 A = `(1)/(2)`
cos 2 A = cos 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]
