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Answer by robjohn for Perimeter of tilted latitude of earth
If the Sun is at declination $\delta$, then at latitude $\beta$, the semi-diurnal arc $\Delta$ is given by$$\cos(\Delta)=-\tan(\delta)\tan(\beta)\tag{1}$$Assuming that the Earth is a sphere of radius...
View ArticlePerimeter of tilted latitude of earth
is there any formula for the perimeter (or length) of part of latitude A degree north of earth, which gets sun light, when tilted towards sun by an angle B degrees??
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