How do you calculate obliquity of ecliptic?

Answer 1

Imagine that you are an equatorian (in Brazil), standing at noon on summer solstice (about June 21). Then, tan (obliquity) = h/l, where h is your height and l is the length of your shadow.

At a solstice noon, the angle of incidence of light rays from the Sun upon the equator is (almost) obliquity = #23.4^o#.
If Y is your head, U your foot and US is shadow, #tan angle USY = (YU)/(US)#, and you subtend #angle USY = obliquity, at S..
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Answer 2

The obliquity of the ecliptic is calculated by measuring the angle between the plane of Earth's orbit and the plane of the celestial equator. Currently, it is approximately 23.5 degrees.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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