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50 cos 30 degrees

the answer is 43.3 but i dont know how to get that answer

 Nov 11, 2014

Best Answer 

 #1
avatar+118725 
+5

50 cos 30 degrees

 

draw an equilateral triangle with side lenth 2

split it in half.

Then you will have a right angled triangle with acute angles 60 and 30 degrees

the sides will be 2,1, and using pythagoras' theorem the 3rd side is sqrt3.

 

From that triangle you can see that cos 30 = sqrt3 / 2

so 50cos30 = (50sqrt3/2) = 25*sqrt3

 

If you just want the approximation it is easier to do it on the calc in the first place.

if you type in 50cos30 into the site calc on the home page then press = maybe a couple of times it will give you your answer.

 Nov 11, 2014
 #1
avatar+118725 
+5
Best Answer

50 cos 30 degrees

 

draw an equilateral triangle with side lenth 2

split it in half.

Then you will have a right angled triangle with acute angles 60 and 30 degrees

the sides will be 2,1, and using pythagoras' theorem the 3rd side is sqrt3.

 

From that triangle you can see that cos 30 = sqrt3 / 2

so 50cos30 = (50sqrt3/2) = 25*sqrt3

 

If you just want the approximation it is easier to do it on the calc in the first place.

if you type in 50cos30 into the site calc on the home page then press = maybe a couple of times it will give you your answer.

Melody Nov 11, 2014

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