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प्रश्न
Solve for x : 3 tan2 (2x - 20°) = 1
योग
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उत्तर
3 tan2 ( 2x – 20°) = 1
tan ( 2x – 20°) = `(1)/(sqrt3)`
tan ( 2x – 20°) = tan 30°
2x –20° = 30°
2x = 50°
x = 25°
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