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17.07.2019 •
Mathematics
If the sin 90º = 1, then which statement is true?
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Ответ:
in a right-triangle, like in the 1st Quadrant, cosine and sine are complements, so then
sin(x) = cos(90° - x)
cos(x) = sin(90° - x)
for this case, sin(90°) = cos(90° - 90°), or just cos(0°) = 1.
Ответ: