Monday

April 21, 2014

April 21, 2014

Posted by **k** on Sunday, December 18, 2011 at 11:20pm.

- trig -
**Steve**, Monday, December 19, 2011 at 12:19amjust drag out your good old trig identities:

sin^2 a + cos^2 a = 1

You have a 3-4-5 and a 8-15-17 triangle.

You could figure that out using the formula above.

Next:

sin(u+v) = sinu cosv + cosu sinv

sin(u+v) = 3/5 * 8/17 + 4/5 * 15/17

and I guess you can take it from there . . .

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