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Daniel za post:
nikola011
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od Daniel » Nedelja, 24. April 2016, 17:31
Pored Pentagramovog, ubedljivo najefikasnijeg postupka, kao i transformacije proizvoda u zbir, uvek možeš i da [inlmath]107^\circ[/inlmath] napišeš kao zbir [inlmath]90^\circ[/inlmath] i [inlmath]17^\circ[/inlmath], pa onda primeniš adicione formule:
[dispmath]\cos107^\circ\cdot\cos17^\circ+\sin107^\circ\cdot\sin17^\circ=[/dispmath][dispmath]=\cos\left(90^\circ+17^\circ\right)\cdot\cos17^\circ+\sin\left(90^\circ+17^\circ\right)\cdot\sin17^\circ=[/dispmath][dispmath]=\left(\cos90^\circ\cos17^\circ-\sin90^\circ\sin17^\circ\right)\cdot\cos17^\circ+\left(\sin90^\circ\cos17^\circ+\cos90^\circ\sin17^\circ\right)\cdot\sin17^\circ=[/dispmath][dispmath]\vdots[/dispmath]
I do not fear death. I had been dead for billions and billions of years before I was born, and had not suffered the slightest inconvenience from it. – Mark Twain