1 / 2

Solution: Using a calculator or a trigonometry table, we find that the sine of 30 degrees is 1 / 2, which is 0.5 in decimal.

0.5

The sine of 30 degrees, if you don’t remember, is 0.5.

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.

one half

So the sine of 30 degrees is one half.

the y-coordinate(0.5) of the point of intersection

The sin of 30 degrees equals the y-coordinate(0.5) of the point of intersection (0.866, 0.5) of unit circle and r.

a tabular value

The sine of 30 degrees is a tabular value.

1/2)/1= 1/2

The sine of 30 degrees is (1/2)/1= 1/2.

by sin π/6.

Sine 30 degrees in radian is given by sin π/6.

exactly 1/2

surface is between 30°S and 30°N – because, as Sheldon Cooper said in TBBT, sine of 30 degrees is exactly 1/2.

of the corresponding point on the unit circle

The value of sin 30 degrees can be calculated by constructing an angle of 30° with the x-axis, and then finding the coordinates of the corresponding point (0.866, 0.5) on the unit circle.

quotient of one by two and cos of 30 degrees

According to trigonometry, sin of 30 degrees is quotient of one by two and cos of 30 degrees

In trigonometry as $\sin{30^\circ}$

In trigonometry, the sine of $30$ degrees is written as $\sin{30^\circ}$ and let us learn what the sin $30$ degrees value is.

the coordinates (0.866, 0.5) of the corresponding point

The value of sin 30 degrees can be calculated by constructing an angle of 30° with the x-axis, and then finding the coordinates of the corresponding point (0.866, 0.5) on the unit circle.

Sin30

Sin30 means the value of Sine (the length of a half-chord on a unit circle) at 30 degrees (in other words, the length of the red line below).

zero point five

Read: 'Zero point five is the sine of thirty degrees.'

1/2 and the cosine of a 30-degree angle

For example, the sine of a 30-degree angle is 1/2 and the cosine of a 30-degree angle is the square root of 3/2.

a rational number and $30$ degrees

The exact value of sine of angle $30$ degrees is a rational number and $30$ degrees is equal to $1$ divided by $2$.

to the fractional value of 1/ 2

Therefore, Sin 30 degree equals to the fractional value of 1/ 2.

of point five

You see point doesn’t matter how big the triangle is; 30 degrees always has a sine of point five.