0.5

So, the inverse sine of 0.5 is 30 since a 30 degree angle has a sine of 0.5.

1/2

Trigonometry tells us that the sine of a 30° angle is 1/2, whereas the sine of a 90° angle is 1.

the sine ratio for an angle of 30°

For example, sin 30° means the sine ratio for an angle of 30°.

of ½ or 0.5

Thus, an angle of 30 degrees has a sine of ½ or 0.5.