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cos(30) = sqrt(3)/2 so cosine squared is 3/4.
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How many squared meters are in 30 cm squared?
.3 m^2
The measure of angle 1 is 50 degrees and the measure of arc PS is 70 degrees Find the measure of arc QR?
30 degrees
What is the answer if you have 70 and 30 in a triangle but you need to find out how much the other angle is?
180 degrees in a triangle 180-70-30 = 80 The other angle is 80 degrees
The perimeter of an equilateral triangle is 45 centimetersFind the length of an altitude?
Each side of the triangle is 45cm/3=15cm. The altitude divides the base into two equal segments of 7.5cm. This results in a right triangle with hypotenuse 15 cm and base 7.5cm. Pythagorus tells us a2+b2=c2 where a=altitude, b=base, c=hypotenuse. a2=c2-b2=152-7.52=225-56.25=168.75, a=12.99cm. Alternatively, the 3 angles of an equilateral triangle are all 60 degrees. The altitude divides one of these angles into two 30 degree angles. The cosine of 30 degrees is the opposite divided by the adjacent side. The adjacent side is the altitude. Thus a/c=cosine of 30 degrees, a=c X cos30 degrees = 15X0.866=12.99cm
What is 30 squared plus B squared equals 78 squared?
First you square root everything on both sides to cancel the squares. 30+B=78 Then subtract 30 from both sides to get B=48. So the answer is B=48
How do you turn cosine of 30 degrees into a fraction?
You cannot. The cosine of 30 degrees is an irrational number.
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
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?
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.
What is the cosine of 30?
0.15425145
How can a force be resolved in to rectangular components?
A force can be resolved into rectangular components by identifying its horizontal and vertical components. This can be done using trigonometry, specifically sine and cosine functions. The horizontal component is found by multiplying the magnitude of the force by the cosine of the angle it makes with the horizontal axis, and the vertical component is found by multiplying the magnitude of the force by the sine of the angle.
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 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
In a circle a 90 degrees sector has an area of 225 pie in squared What is the radius of the circle?
area = 225 pi = pi R squared/4 R = square root 900 = 30 in
What is cosine of 30 degree angle?
On the unit circle, at 30 degrees the point is ( sqrt(3)/2 , 1/2 ) Cosine "represents" the x value (x, y) Therefore: cos(30) = sqrt(3) / 2 It is highly advisable for you to memorize the unit circle -- at least the quadrant I angles (0, 30, 45, 60, and 90). I'll include a link to a good unit circle reference in the related links.
