Hello

How would I go about converting 9 sin120 into the form with a surd:

9*(squareroot of 3)

-------------------

............2

?

Thank you :)

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- Feb 12th 2011, 06:44 AManees7112How to turn 9 sin120 into (9*(squareroot3))/2
Hello

How would I go about converting 9 sin120 into the form with a surd:

9*(squareroot of 3)

-------------------

............2

?

Thank you :) - Feb 12th 2011, 06:47 AMProve It
You should know that for .

- Feb 12th 2011, 06:52 AMskeeter
value from the unit circle ...

http://math.asu.edu/~arce/Unit%20Cir...nit_circle.gif - Feb 12th 2011, 07:45 AMe^(i*pi)
Although the other two methods are easier you can use the fact that

30 and 90 are, of course, found on a 30-60-90 triangle