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Elanso [62]
3 years ago
8

Which of these is equal to sin 21

Geography
1 answer:
Fittoniya [83]3 years ago
4 0
You didn't give your choices but sin 21 equals 0.358.
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Answer:

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(T_a^4)(R_a^2) = (T_b^4)(R_b^2)

as long as this relation between a and b is true, then the luminosity can be the same.

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