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Question
Solve for x : 2 cos (3x − 15°) = 1
Sum
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Solution
2 cos(3x –15°) = 1
cos (3x – 15°) = `(1)/(2)`
cos (3x – 15°) = cos 60°
3x – 15° = 60°
3x = 75°
x = 25°
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Trigonometric Equation Problem and Solution
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