teliot
Joined: Oct 19, 2009
• Posts: 2575
June 13th, 2015 at 7:34:12 AM permalink
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rdw4potus
Joined: Mar 11, 2010
• Posts: 7237
June 13th, 2015 at 7:37:10 AM permalink
Indeed. And the solution to this formula is "supposed to be" 30 degrees, so that it validates the trig-based answer to the puzzle.

FWIW, the source's instructions (but not the instructions in the puzzle thread) say NOT to use trig, and to use geometry instead.
"So as the clock ticked and the day passed, opportunity met preparation, and luck happened." - Maurice Clarett
MangoJ
Joined: Mar 12, 2011
• Posts: 905
June 13th, 2015 at 7:48:28 AM permalink
Quote: ssho88

So, what is the answer ?

Who cares. This is the math forum. It is sufficient that an answer exists and is unique. Furthermore WolframAlpha gives you an exact expression... who would you ever need more ? :)
ssho88
Joined: Oct 16, 2011
• Posts: 643
June 13th, 2015 at 7:48:47 AM permalink
Quote: rdw4potus

Indeed. And the solution to this formula is "supposed to be" 30 degrees, so that it validates the trig-based answer to the puzzle.

FWIW, the source's instructions (but not the instructions in the puzzle thread) say NOT to use trig, and to use geometry instead.

Could you please show me the source's instructions ?
rdw4potus
Joined: Mar 11, 2010
• Posts: 7237
June 13th, 2015 at 7:51:16 AM permalink
Quote: ssho88

Could you please show me the source's instructions ?

You may use only elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use trigonomery, such as sines and cosines, the law of sines, the law of cosines, etc.]
"So as the clock ticked and the day passed, opportunity met preparation, and luck happened." - Maurice Clarett
24Bingo
Joined: Jul 4, 2012