my calculator is set to degree but when I do sin(pi) it gives me the answer as 0.054804 which is weird because the answer is obviously 0 in both DEG and RAD


closed as off-topic by JMoravitz, ahulpke, GAVD, user99914, Moishe Kohan Oct 27 '17 at 4:11

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  • 1
    $\begingroup$ In degree $\sin(\pi)$ is just $\sin(3.1\dots)$. In degree, $\sin(x) = 0$ implies that $x = k180$ for some $k\in\mathbb{Z}$. $\endgroup$ – Mark Oct 26 '17 at 21:32
  • $\begingroup$ Woooooow I feel stupid haha thanks $\endgroup$ – Samuel Uribe Oct 26 '17 at 21:34
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    $\begingroup$ User error, not calculator error. $\endgroup$ – JMoravitz Oct 26 '17 at 21:39

Yeah, but remember that $\pi \mathrm{\: rad}=180^{\circ}$, so $\sin(\pi^{\circ}) \neq \sin(\pi \: \mathrm{rad})$. $\sin(\pi)=\sin(180^{\circ})=0$. Check that your calculator is in RAD, not in DEG nor GRAD.


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