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Q:

निम्नलिखित विकल्पों में से गलत सूत्र का चयन करें।

  • 1

    cosec2θ - cot2θ=1

  • 2

    sin2θ + cos2θ=1

  • 3

    sec2θ + cos2θ=1

  • 4

    sec2θ – tan2θ=1

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Answer : 3. "

sec2θ + cos2θ=1

"

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