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प्रश्न
Find the value of :
tan (– 690°)
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उत्तर
tan (– 690°) = – tan 690°
= – tan (720° – 30°)
= – tan (2 × 360° – 30°)
= – (– tan30°)
= tan 30°
= `1/sqrt(3)`
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संबंधित प्रश्न
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