Posted by Ma on Friday, October 7, 2011 at 1:00pm.
Is it a right triangle? Is side x the hypotenuse?
A figure needs to go with your question.
If the angle in question is measured from the x axis, and the angle is defined by the x axis and a line from the origin to (x,y), then the angle is arctan 8/15 and the sine is 8/sqrt(64 + 225)
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