As a decimal: 0.866 As a fraction: √(3)/2
If you know the angle's sine, cosine, or tangent, enter it into the calculator and press <inverse> sine, cosine, or tangent. On MS Calc, in Scientific Mode, using Degrees, enter 0.5, then check Inv and the press sin. You should get 30 degrees. The other functions work similarly.
Since a complete circle is 360 degrees, a 30-degree part of a circle is 30/360, or 1/12, of the pie.
No. Cosine, along with sec, is an even function. The odd functions are sin, tan, csc, and cot. The reason for this is because is you take the opposite of the y-value for the cosine function, the overall value of the function is not affected.Take, for example, cos(60 degrees), which equals POSITIVE 1/2.If you flip it over the x-axis, making the y's negative, it becomes cos(-60 degrees), or cos(300 degrees). This equals POSITIVE 1/2.Now let's look at an odd function. For example, sin(30 degrees) equals POSITIVE 1/2. Now take the opposite of this.sin(-30 degrees), or sin(330 degrees), equals NEGATIVE 1/2. This is because it is found in the fourth quadrant, where the y's are negative. Sine of theta, by definition, is y divided by r. If y is negative, sine is negative.
Sin30 degrees is 0.50000
cos(30) = sqrt(3)/2 so cosine squared is 3/4.
0.866 ( or (sqrt 3)/2 )
As a decimal: 0.866 As a fraction: √(3)/2
cos(30 deg) = sqrt(3)/2 = 0.8660 approx.
A full turn is 360 degrees Therefore 144 degrees = 144/360 turn = 12/30 = 6/15 = 2/5 turn
30 degrees
30 degrees
the fraction of 30 degrees is 1/12 30 degrees/360 degrees divide to the lowest term 30/360( divide by 2)=15/180(divide by 3)=5/60(finally we divide by 5)=1/12 therefore the answer is 1/12
30 = 30/1 = 60/2 and so on.
If you know the angle's sine, cosine, or tangent, enter it into the calculator and press <inverse> sine, cosine, or tangent. On MS Calc, in Scientific Mode, using Degrees, enter 0.5, then check Inv and the press sin. You should get 30 degrees. The other functions work similarly.
Cosine(30) = sqrt(3)/2
1/12