Question

can you help me

Answer 1

integration on substitution

Answer 2

what's integral this ?

Answer 3

y' =sinxcosx
a) let u=sinx
then equation be \[\int\limits_{}^{}dy=\int\limits_{}^{}udu\]
b)given formula sin 2x=2sinxcosx

then equation be \[\int\limits_{}^{}dy=\frac{ 1 }{ 2 }\int\limits_{}^{}\sin 2x dx\]
is my answer wrong..if right, can you compare the answer? and make conclusion?

Answer 4

yeah, before do subtitution try using the identity :
sin2x = 2sinxcosx or
sinxcosx = 1/2 sin2x

Answer 5

so, it's same with