How do you simplify #sin(x+pi)#?
1 Answer
Jul 31, 2016
Explanation:
Using
#color(blue)"addition formula for sin"#
#color(red)(|bar(ul(color(white)(a/a)color(black)(sin(A+B)=sinAcosB+cosAsinB)color(white)(a/a)|)))#
#rArrsin(x+pi)=sinxcospi+cosxsinpi# now
#cospi=-1" and " sinpi=0#
#rArrsinxcospi+cosxsinpi=-sinx+0#
#rArrsin(x+pi)=-sinx#
