Question Number 227184 by Spillover last updated on 04/Jan/26
Answered by Spillover last updated on 04/Jan/26
Answered by Spillover last updated on 04/Jan/26
Answered by efronzo1 last updated on 05/Jan/26
$$\:=\:\mathrm{4}\underset{\mathrm{0}} {\overset{\pi/\mathrm{2}} {\int}}\mathrm{sin}\:\mathrm{x}\:\mathrm{dx}\: \\ $$$$\:=\:\mathrm{4}\:\left(−\mathrm{cos}\:\mathrm{x}\right)_{\mathrm{0}} ^{\pi/\mathrm{2}} \\ $$$$\:=\:\mathrm{4}\:\left(\mathrm{0}−\left(−\mathrm{1}\right)\right)=\:\mathrm{4} \\ $$