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Evaluate : tan1° tan2° tan3° tan4°………… tan87° tan88° tan89°

If (1 + Sin A)(1 + Sin B)(1 + Sin C) = (1 − Sin A)(1 − Sin B)(1 − Sin C), then each side is equal to

If tanA + cotA = 2, then the value of tan7A + cot7A is ?

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If tan Θ = 3/4 and Θ is acute, then cosec Θ is