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At what angle does sunlight strike the equator? The poles?

Answer 1

It depends of the time of the year.

During the equinoxes the Sunlight subtends an angle of 90º (i.e is right above our heads), with the equator and 0º with the poles.

During the solstices, the sunlight subtends an angle of 90º with the one tropic (capricorn/cancer), 67º with the equator 44º with the other tropic (cancer/capricorn) and 23º with one of the poles(south) and is not visible in the other (north). In other times of the year, we have intermediate angles.

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Answer 2

Aaron Anderson

Sunlight strikes the equator at a perpendicular angle (90 degrees). Near the poles, sunlight strikes at a more oblique angle, varying depending on the season, but it can approach nearly parallel to the surface during certain times of the year.

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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.