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1. en.wikipedia.org › wiki › SunSun - Wikipedia

   en.wikipedia.org › wiki › Sun

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   2 godz. temu · One astronomical unit (about 150 million kilometres; 93 million miles) is defined as the mean distance between the centres of the Sun and the Earth. The instantaneous distance varies by about ± 2.5 million km or 1.55 million miles as Earth moves from perihelion on ~ January 3rd to aphelion on ~ July 4th.

2. en.wikipedia.org › wiki › Sine_and_cosineSine and cosine - Wikipedia

   en.wikipedia.org › wiki › Sine_and_cosine

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   1 dzień temu · The exponential function is defined on the entire domain of the complex numbers.The definition of sine and cosine can be extended to all complex numbers via ⁡ = ⁡ = + These can be reversed to give Euler's formula = ⁡ + ⁡ = ⁡ ⁡ When plotted on the complex plane, the function for real values of traces out the unit circle in the complex plane.. When is a real number, sine and cosine ...