1. The number of hours of daylight on the summer solstice is ?hours. (Round to 2 decimal)
2. The number of hours of daylight on the vernal equinox is ?hours. (Round to 2 decimal)
3. The number of hours of daylight on July 4th is ? hours.(Round to 2 decimal)
The formula D=24[1−πcos−1(tanitanθ)] can be used to approximate the number of hours of daylight when the declination of the Sun is i∘ at a location θ∘ north latitude. To use the formula, cos−1(tanitanθ) must be expressed in radians. Approximate the number of hours of daylight in a city at 30∘18′ north latitude on (a) the summer solstice (i =23.5∘ ), (b) the vernal equinox (i =0∘ ), and (c) July 4 (i=22∘48′)
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