proof left as an exercise
06-06-2022, 11:41 PM
Post: #1
 Thomas Klemm Senior Member Posts: 1,806 Joined: Dec 2013
proof left as an exercise
Just stumbled upon this and thought some of you might enjoy solving this as well.
Quote:Prove that the following expression can be expressed as being identical to a single standard trigonometric function of an integer input with all inputs being in degrees.
You may use a calculator or trig table as a guide, but the results from the calculator or trig table will not be accepted as part of the proof.

\begin{align} \frac{2\cos(30^{\circ})}{1+4\sin(70^{\circ})} = \,? \end{align}
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 Messages In This Thread proof left as an exercise - Thomas Klemm - 06-06-2022 11:41 PM RE: proof left as an exercise - Ángel Martin - 06-07-2022, 05:05 AM RE: proof left as an exercise - Thomas Klemm - 06-07-2022, 05:32 AM RE: proof left as an exercise - Albert Chan - 06-07-2022, 05:36 PM RE: proof left as an exercise - Albert Chan - 06-07-2022, 06:17 PM RE: proof left as an exercise - Albert Chan - 06-08-2022, 01:50 AM RE: proof left as an exercise - Albert Chan - 06-08-2022, 11:12 AM RE: proof left as an exercise - Thomas Klemm - 06-08-2022, 11:18 PM RE: proof left as an exercise - Albert Chan - 06-09-2022, 12:35 AM RE: proof left as an exercise - Albert Chan - 07-01-2022, 07:51 PM RE: proof left as an exercise - Albert Chan - 07-02-2022, 11:44 PM

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