Learn how to evaluate using the half angle formula of sine

👉 Learn how to evaluate the Sine of an angle using the half-angle formula. The half-angle formula for Sine is helpful when you need to determine the exact value of function given an angle but cannot use a calculator or the angle is not on the unit circle. To evaluate all we need to do is enter the angle into the formula and simplify. Rationalizing the denominator is not required but often is asked to be performed.
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Organized Videos:
✅ Half Angle Formulas
• Half Angle Formulas
✅ Evaluate Half Angle Formulas of and Angle
• Evaluate Half Angle Fo...
✅ Evaluate Half Angle Formulas from a triangle
• Evaluate Half Angle Fo...
✅ Write the Expression as a single function | Half Angle Formulas
• Write the Expression a...
✅ Solve Equations using Half Angle Formulas
• Solve Equations using ...
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[@williamstephenjones3863]

Dear Brian, can't thank you enough for this explanation. I'm a mature student in the midst of a maths module for a physics degree. I've been doing just fine until half-angles. I just couldn't get it to click in my mind. Your video has done just this. Please know that (I think) you are contributing to the overall net positivity in the world in sharing your knowledge. Best, Will.

[@jordangertino1867]

I have a Geometric Proof on my channel I need visual representations personally.

[@brianmclogan]

you are very welcome! happy to help

[@TheFarmanimalfriend]

have you no shame?

[@magicjohnson1622]

Thanks chief kief

[@faizahjamalallail1437]

LOVE THE WAY YOU EXPLAIN THINGS THANK YOU I WAS STRUGGLING

[@roelortiz4303]

Thank you so much mr. Logan,, I've been trying think on how the half angle identity formula was derived for about 2 hours, and after watching your video, I've got it in less than 3 minutes! Again thank you sir ,

[@brianmclogan]

You are so
Very welcome!

[@davidsandoval3683]

freaking Rachel wth

[@brianmclogan]

haha

[@yasmineyasmine8059]

Thank you very much for showing the first steps, I was lost for couple of weeks because of the first step. Thank you much!!!!!

[@wildfirestudios4868]

Rip to all the rachels watching this video

[@HusenMohammed-v1r]

Wow I am from Ethiopian I don't enough words to thanks

[@emilymariano2354]

Is this a high school class you're teaching? Because I'm tutoring this lesson right now to some senior high students but I need first to review for it myself because it's been so long since I have taken this lesson.

[@shamsali2035]

Seriously you are awesome...easy to follow..
I appreciate you

[@SuperLazyCat]

thank you so much. Got finals this helped a bunch.

[@brianmclogan]

you are very welcome! happy to be able to help

[@zachroth7454]

Extremely helpful, thank you!

[@V.Z.69]

4:43 what you really want to say is, "we are merely multiplying by ONE".

[@nighthunterian684]

i don't understand what you did at the end, how you got 1/2

[@mountcarmel7116]

Thanks for a clear explanation.

[@PerplexedGibbon]

Dude I know what that chick was talking about. I tried that, eliminating the 2 up top before moving on to the bottom, but if you do that you end up with a radical in the denominator and when you try to rationalize it, it screws everything up.

[@elodieramburrun138]

Can you help me with this question: Determine a value of x for each of the following. Give answers in simplest exact form. sin(8π/23)=sinx, x not equal to 8π/23.

[@vlalto]

Thank you for this!

[@ohenbridges688]

Thank you so much🙏

[@irinagrigoryan2874]

Thank you!

[@brianmclogan]

you are very welcome Irina!

[@pokerboy72]

Thank u sir

[@candralyons6861]

How does( rt(rt2)) simplify to just rt(2)?

[@jitterrypokery1526]

Why did you pick the x value cordinate and noth the y value cordinate?

[@barsouth2478]

because cos is tequal to the x value

[@oj214]

Why is the sign positive? Cosine is negative in quadrant 2.

[@michaelandrews6716]

what do you teach in your school

[@bigredone1030]

He teaches art

[@GeoCalifornian]

Michael Andrews ...Brian McLogan teaches the art of mathematics.

[@bigredone1030]

George Obregon no he teacher visual arts and specializes in engraving

[@KMMeler]

Underwater basket weaving

[@caleb.9]

Yall can still turn to Christ God bless

[@ahmadke8950]

Was perfect professor

[@jayveebernaldez1087]

The first problem he shown is literally the problem that we have to solve written on our sheets wth

[@idria2736]

k rachel?

[@kylephan1895]

just change it to angle and your life will be easier

[@megalucario2321]

I'm not able to follow this at all I can't wait to fail my class and then never be able to graduate

[@pokerboy72]

I hate simply piano

[@TheFarmanimalfriend]

u=3pi/8, Sin(3pi/8) = sin[(3/8)pi] which is in the 1st quadrant. 'u' is given. 3pi/4+3pi/4 = 3pi/2! How is it possible top be so wrong? Have you no shame?

[@nooneknows7268]

are you serious rn