Question
The value of
(3tan10°-tan³10°)/(1-3tan²10°) is equal toSolution
tan3θ = (3tan10°-tan³10°)/(1-3tan²10°) Therefore, (3tan10°-tan³10°)/(1-3tan²10°) = tan3 × 10° → tan30° = 1/√3
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