Question 364392
{{{sin(x+y) = sin(x)*cos(y) + cos(x)*sin(y)}}}
{{{sin(x+(3/2)pi) = sin(x)*cos((3/2)pi) + cos(x)*sin((3/2)pi)}}}
{{{sin(x+(3/2)pi) = sin(x)*(0) + cos(x)*(-1)}}}
{{{highlight(sin(x+(3/2)pi) = -cos(x))}}}