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sec A given, A acute: find sin A

The same question, asked 2 times: 12 Sep 2025 S2*, 24 Sep 2025 S1. Every wording below, oldest first.

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  1. Question 1

    12 Sep 2025 S2

    75
    If sec⁡A=135\sec A = \frac{13}{5} and A is acute, find sin⁡A\sin A.

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  2. Question 2

    24 Sep 2025 S1

    70
    If sec⁡A=1312\sec A = \frac{13}{12} and A is acute, find sin⁡A\sin A.

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