Hello

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

9*(squareroot of 3)

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

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

?

Thank you :)

Printable View

- February 12th 2011, 05:44 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 :) - February 12th 2011, 05:47 AMProve It
You should know that for .

- February 12th 2011, 05:52 AMskeeter
value from the unit circle ...

http://math.asu.edu/~arce/Unit%20Cir...nit_circle.gif - February 12th 2011, 06:45 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