Just purely confused as to how to answer these questions? Am I correct in assuming for a) i) that the coordinates would be (20, 0.342) and therefore to be sketched on the sine graph?

http://i48.tinypic.com/nx55hj.jpg

Thanks, feel a bit stupid here!

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- Oct 12th 2012, 10:00 AMDonGorgonBasic Trig issue
Just purely confused as to how to answer these questions? Am I correct in assuming for a) i) that the coordinates would be (20, 0.342) and therefore to be sketched on the sine graph?

http://i48.tinypic.com/nx55hj.jpg

Thanks, feel a bit stupid here! - Oct 12th 2012, 10:08 AMebainesRe: Basic Trig issue
Seems correct - they want you to plot the point (20, sin(20)), which is indeed (20, 0.342).

- Oct 12th 2012, 11:21 PMKyoRe: Basic Trig issue
Confirming ebaines' reply.

Hint to what you might want to notice: Once you're finished the graph, look where points are at the same height (amplitude, y-value, sin(theta) value) and the difference in theta between them! If what I said is complicating, then please ignore this.