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"