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7 December, 18:58

For what value of x is sin x = cos 19º, where 0°< x < 90°?

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  1. 7 December, 19:23
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    71°

    Step-by-step explanation:

    The cosine of an angle is equal to the sine of its complement:

    cos (19°) = sin (90° - 19°) = sin (71°)

    Comparing to the given expression, we see that x = 71°.
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