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

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Q: How do you find cosine squared at 30 degrees?
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Related questions

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

You cannot. The cosine of 30 degrees is an irrational number.


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

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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.


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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.


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


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


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