Calculator malfunction

Question

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

Answer 1

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.