Question 1151364

use identity:

{{{sin(pi/2 + x) = sin(pi/2) cos(x) + cos(pi/2) sin(x)}}}.............  {{{sin(pi/2) =1}}} and {{{cos(pi/2)=0}}}


{{{sin(pi/2 + x) = 1*cos(x) + 0* sin(x)}}}


{{{sin(pi/2 + x) = cos(x) }}}



answer is:

E) {{{y=sin((pi/2)+x)}}}