Half Angle Formulas - How to Use

[@KristinaTrotsiuk]

Thank you so much for making these videos, I’m really glad teachers and professors with teaching gift like yours share on this KZbin, helping thousands of students!

[@MariosMathTutoring]

You're very welcome!

[@TheFarmanimalfriend]

At last an instructor who knows what he is talking about.

[@MariosMathTutoring]

Glad you like my videos!

[@GuitarMAXMusic]

Thanks for showing the details in the arithmetic!

[@MariosMathTutoring]

Your welcome!

[@yasmineyasmine8059]

Would you please explain why you used 3pi/4 instead of 3pi/8? Is it because 4 is the half of 8? What about sin(pi/12), should we use sin(pi/6) knowing that 6 is the half of 12? Thank you!

[@aprilboza5945]

Hello I was wondering when to know whether to use half angle identities or pythagorean identities when evaluating an integral. When using the substitution method i sometimes use the half angle when im supposed to use pythagorean, so how do I know when to use which, or what is a telling factor? Thank you!!

[@Joooshey]

You may have saved my trigonometry grade

[@MelvinJepchirchir-t5t]

How did you end up 225 kindly

[@truckwheeler9046]

How did you get 225??

[@gwennguyen7566]

for the last question, how did you get 3pi/8 to be 3pi/4

[@yasmineyasmine8059]

Yes, me too I have the same question, maybe 4 is the half of 8?

[@sumedhanuganti5385]

@@yasmineyasmine8059 must've been a typo. There is no 3pi/8 on the unit circle

[@adrianovelazquez9649]

You explain very clearly thank you!

[@MariosMathTutoring]

+Adriano velazquez your welcome. I'm glad my video helped you.

[@Stargaming-xg8qv]

you are the best

[@날개달린_양]

thank you for video. Appreicate

[@MariosMathTutoring]

You are welcome

[@djklsjfjflkdsjfsd1006]

How do you know which tangent half angle formula to choose as the problems come up? Like I have three formulas and got an answer wrong using the not radical formula.

[@747.royale]

same here

[@RubiMercuri]

can you make a video on power reducing formulas?

[@MariosMathTutoring]

Thanks for the suggestion...yes...I haven’t done a video on that topic yet.

[@johnwhite1025]

so the root 2 over 2 how did you get that im lost

[@MariosMathTutoring]

+john white you may want to review the unit circle that is where those values are coming from. You can check out the video I did on the unit circle here kzbin.info/www/bejne/n3nEaZltoJmHnZo

[@freeetriall5727]

i think im in love with u