How could I turn 2sin5xcos3x into a sum of trig functions?
2 Answers
Aug 6, 2018
Explanation:
We know
Substitute ,
Aug 6, 2018
Explanation:
#"using the "color(blue)"product to sum formula"#
#•color(white)(x)2sinxcosy=sin(x+y)+sin(x-y)#
#"here "x=5x" and "y=3x#
#2sin5xcos3x#
#=sin(5x+3x)+sin(5x-3x)=sin8x+sin2x#