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February 27, 2015

February 27, 2015

Posted by **Adam** on Saturday, March 30, 2013 at 9:50pm.

Find the exact value of sin theta,

- math -
**Khaled**, Sunday, March 31, 2013 at 5:57am(sin theta)^2+(cos theta)^2=1;

(sin theta)^2+1/10=1;

(sin theta)^2=9/10

sin theta= 3/(sqrt10)

OR

sin theta=-3/(sqrt10)

But since theta is a first quadrant angle

==> sin theta is positive

Therefore, sin theta= 3/(sqrt10)

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