It is simply the sine of the supplementary angle.
If x is an angle measuring (90, 180) degrees, then
sin(x) = sin(180 - x).
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The sine of one of the acute angles in a right triangle is the ratio of the length of the side opposite the angle to the length of the hypotenuse.
Yes. Two obtuse angles, of equal measure.Yes. Two obtuse angles, of equal measure.Yes. Two obtuse angles, of equal measure.Yes. Two obtuse angles, of equal measure.
In a right-angled triangle, the sine of one of the smaller angles is the ratio of the length of the opposite side to the length of the longest side.
Because they are obtuse angles!
No an abtuse triangle can not have two obtuse angles