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cos(30) = sqrt(3)/2 so cosine squared is 3/4.

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8y ago

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How do you turn cosine of 30 degrees into a fraction?

Cos(30) = sqrt(3)/2 = 0.866025403.... ( Which is irrational).


What is cosine 30 degrees?

0.866 ( or (sqrt 3)/2 )


What the only formula you can find the exact value of cosine 30?

Cosine(30) = sqrt(3)/2


Find a cos of some value?

To find the cosine of a specific angle, you can use a scientific calculator or refer to the unit circle. For example, the cosine of 0 degrees (or 0 radians) is 1, while the cosine of 90 degrees (or π/2 radians) is 0. Additionally, you can use trigonometric identities or tables for common angles such as 30 degrees (√3/2), 45 degrees (√2/2), and 60 degrees (1/2).


What is the cosine 30 degrees?

cos(30 deg) = sqrt(3)/2 = 0.8660 approx.


How do you find an angle using sine cosine tangent?

First make sure your calculator is in 'Degree Mode (D)'. Then using the 'Inverse' of 'Sin' , shown as 'ArcSin' or ' Sin^(-1)' . enter '0.5', followed by '=' . The answer should be '30' ( 30 degrees).


What is the value of cos 30 degrees?

The value of cos 30 degrees is (\frac{\sqrt{3}}{2}). This is a commonly used value in trigonometry, derived from the properties of a 30-60-90 triangle. In this triangle, the ratio of the adjacent side to the hypotenuse corresponds to the cosine of 30 degrees.


What angle measures 30 degrees?

An angle that measures 30 degrees is one-third of a right angle, which measures 90 degrees. It is often associated with the angles found in a 30-60-90 triangle, where the angle measuring 30 degrees is opposite the shortest side. This angle is commonly used in various fields, including trigonometry and geometry, and has specific sine, cosine, and tangent values.


Which is the 30o-60o-right triangle theorem?

If its a 300-600-right angle triangle then the third angle must be 90 degrees. Then its base squared plus its height squared equals its hypotenuse squared usually written in the form of: a2+b2 = c2


How can a force be resolved in to rectangular components?

You would use trigonometry for that. If, for example, you have a force of magnitude 10 at an angle of 30 degrees: * The x-component is 10 times the cosine of 30 degrees * The y-component is 10 times the sine of 30 degrees Or better yet, learn to use the polar-->rectangular conversion on your scientific calculator.


How to find the exact value of arc sine and cosine and tangent?

mostly it comes from memorization. If sin 30 = 1/2, then arcsin (1/2) = 30


How do you find length of a hypotenuse of a 30 60 90 degree triangle is 7 cm what is the perimeter?

The length of the other two sides is 7 cosine (60) and 7 cosine (30)that is 3.5 and 6.062 cmthe perimeter = 7 + 3.5 + 6.062 = 16.562 cm