- #1
Mspike6
- 63
- 0
Hey guys..
first, i want to ask if anyone know a good tutorial or website that can help me with the Treg. deffrentiation, and limits...cause am troubles with that :(
I got some questions..
1)
Prove the Identity Tanx+1/Tanx-1 = Secx-cscx
I have no clue how to prove sucha a thing..
2)Evaluate Limx-> Pi/41-Tanx/Sinx-Cosx
I tried to find any identity to change it's form, but i couldn;t figure anyone out
And the last one is Deffrentiate Sin2x=2sinxcosx, to devolop the identity of Cos2x
Y= Sin2x=2sinxcosx
y'=Cos2x.2 = -2cosxsinx
y'= Cos2x=-sinxcosx
But Cos2x should be equal to Cos2x-sin2x ??
first, i want to ask if anyone know a good tutorial or website that can help me with the Treg. deffrentiation, and limits...cause am troubles with that :(
I got some questions..
1)
Prove the Identity Tanx+1/Tanx-1 = Secx-cscx
I have no clue how to prove sucha a thing..
2)Evaluate Limx-> Pi/41-Tanx/Sinx-Cosx
I tried to find any identity to change it's form, but i couldn;t figure anyone out
And the last one is Deffrentiate Sin2x=2sinxcosx, to devolop the identity of Cos2x
Y= Sin2x=2sinxcosx
y'=Cos2x.2 = -2cosxsinx
y'= Cos2x=-sinxcosx
But Cos2x should be equal to Cos2x-sin2x ??