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Because that is accepted definition. The sine is opposite over hypotenuse, or Y in the unit circle. The cosine is adjacent over hypotenuse, or X in the unit circle. The tangent is sine over cosine, etc. For more information, please see the related link below.

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What is the ratio between the opposite and hypotenuse?

The ratio between the opposite side and the hypotenuse in a right triangle is known as the sine of the angle opposite the opposite side. Mathematically, this can be expressed as ( \sin(\theta) = \frac{\text{opposite}}{\text{hypotenuse}} ). Therefore, for a given angle ( \theta ), this ratio is equal to the sine of that angle.


What is the trig ratio equal to the opposite side divided by the hypotenuse?

sine


The sine ratio of an angle is the opposite side over the adjacent side?

Opposite over hypotenuse. Sin=opposite/hypotenuse cos=adjacent/hypotenuse tan=opposite/adjacent


What is the ratios function of sin?

The sine of an angle in a right triangle is the ratio of the length of the side opposite the angle to the length of the hypotenuse.In terms of ratios, the sine of an angle is defined, in a right angled triangle, as the ratio of lengths of the opposite side to the hypotenuse.


What is the ratio of opposite to hypotenuse?

It is the sine ratio.


What is the ratio of side opposite over hypotenuse?

It is the Sine(Sin) ratio. Sin(angle) = o/h


What is sine of 90 degrees?

The sine of 90 degrees is equal to 1. This is because, in the context of a right triangle, the sine function represents the ratio of the length of the opposite side to the hypotenuse. At 90 degrees, the opposite side is equal to the length of the hypotenuse, resulting in a ratio of 1.


Is this statement true or false The sine of an angle in a right triangle is the ratio of the length of the side adjacent to that angle to the length of the hypotenuse.?

False because sine ratio = opposite/hypotenuse


The sine of an angle is equal to what ratio?

Sine = opposite / hypotenuse


The trigonometric ratio that compares the opposite side going to the hypotenuse is a SINE b TANGENT c Cosine?

a) sine


What is sin in trigonometry?

If you have a right triangle, the sine of an angle is the ratio of the opposite side to the hypotenuse.


In trig what is the opposite side over the hypotenuse?

It is the 'sine' ratio for a right angle triangle