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Nisarg Bhavsar · Answer 1 · 2024-03-11T12:02:13+0000

If cos A = 5/4 and A is in quadrant 1, then sin A = sqrt(1 - cos^2(A)) = sqrt(1 - 25/16) = 3/4 and tan A = sin A / cos A = (3/4) / (5/4) = 3/5. Therefore, sin A * tan A = (3/4) * (3/5) = 9/20.

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