Trig Limit (1 - tanx)/(x - pi/4) Compound Angle Substitution

[@bobbyshetty8556]

3 years later its still helping students. Thanks

[@dhruvgupta1670]

Just amazing

[@sanjaysaw5649]

Sir one question, please explain
Lim (sin3x-3sinx)/(π-x)^3
x->π

[@rahulkeshri4410]

Lim x tends to 0, x tan4x divided by 1-cos 4 x. Explain how I solve this question

[@MathematicsTutor]

Will post the solution soon. Thanks

[@vikashini1687]

Hi sir, can u pls give explain in what Situation will use this method of limit substitutions (Ex: u did in this problem teta = x- pi/4)

[@vallanroquemascarenhas7480]

It's usually done for every trignometric limit which gives 0/0 on direct substitution, if we get a non 0/0 result on direct substitution, then we don't do that step

[@nikunjtiwari9524]

Thank u sir Your answer is very helpful to me

[@hibahiba-mi1yy]

Thank u teacher❤

[@Deepu2198]

thanks

[@516mahimatyagi_hlllyear8]

Very good

[@MathematicsTutor]

Thanks for appreciation

[@findingme9157]

Thankyou so much this is so helpful Im gonna cry

[@royal_me8370]

Thankewwwwww

[@buhlelungileshabalala2896]

Sir I am confused a little bit...on the second step why did u divide with 1-tan♡.tan◇

[@nandanijaiswal9076]

Because he used the identity ... the formula of Tan(A+B) = TanA +TanB / 1-TanA .TanB

[@saritajha5411]

Thanku sir

[@prachimohanty2351]

Thank u sir

[@MathematicsTutor]

Thanks. Here is related Playlist: ua-cam.com/video/5Q_KuxGhTr8/v-deo.html

[@rameshsahu5433]

Use L hopital to solve faster

[@MathematicsTutor]

That is correct. However, we teach L'Hopitals Rule in Calc 2.
Thanks

[@saisirimangarapu3685]

Can't we use lhospital rule

[@MathematicsTutor]

Yes, you can, thanks