On what days was the observation carried out if the height of the Sun at the upper climax was 66 ° at latitude 47 °?

You need to find the declination of the Sun, h = 90 ° -f + 8; 8 = h – 90 ° + f; 8 = + 23 °. The declination of the Sun is 23 ° on the summer solstice – June 20 or 21.

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