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    Maths-
    General
    Easy

    Question

    x equals square root of fraction numerator 1 minus cos space theta over denominator 1 plus cos space theta end fraction end root not stretchy rightwards double arrow fraction numerator 2 x over denominator 1 minus x squared end fraction equals

    1. sin space theta
    2. cos space theta
    3. tan space theta
    4. cot space straight theta

    The correct answer is: tan space theta

      tan squared space A over 2 equals fraction numerator 1 minus cos space A over denominator 1 plus cos space A end fraction

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