How do you verify #2cos^2(x/2)tanx = tanx+sinx#?
1 Answer
Jul 12, 2018
Explanation:
#"using the "color(blue)"trigonometric identity"#
#•color(white)(x)cos2x=2cos^2x-1#
#"consider the left side"#
#(cosx+1)tanx#
#=tanx+(cancel(cosx)xxsinx/cancel(cosx))#
#=tanx+sinx=" right side "rArr"verified"#
