Half-Angle Identities

[amberreend07]

your voice is sexi

[williamk766]

At 8:50, what happened to the /2 under 1+3/5?

[Rcv222]

lets like the video now... ok its time to watch the vid



[majormuss]

nice pls keep up the good work

[FutbolFanatic90]

how'd you get (squareroot of 2 divided 2)?

[waszel]

@FutbolFanatic90 From a combination of earlier videos: 1) Right Triangle Trigonometry, 2) Trigonometric Function Values of Special Angles, and 3) Reference Angles.

[rellik1945]

Thanks this was really helpful

[primeroperro]

Thanks! i actually know how to do this now! However, in my homework a problem like sin382.5° showed up. how would i do this type of problem?

[waszel]

@primeroperro The reference angle for 382.5º is 22.5º, and 22.5º is half of what angle? Once you know that you can figure out the sin382.5º

[Expressjeans210]

Thanks for the help

[Thekimo651]

thanks

[SportsFreakfrom94598]

Thank you!

[lildude677]

ty!