Right Triangle Trigonometry (1 of 2)

Part 1: A review from geometry reminds us what SOHCAHTOA was all about: sine (sinx), cosine (cosx), and tangent (tanx). We learn about the reciprocal trig functions, cosecant (cscx), secant (secx), and cotangent (cotx). An example of how to find the 6 trig ratios given two sides of the triangle is given. I use Pythagorean theorem as well.

Part 2: The first example shows how to solve a triangle (find all of the missing sides and angles) given a side and an angle. Next we review the ratios of the special triangles (45-45-90 and 30-60-90). I show how to evaluate all 6 trig ratios of the 30, 45, and 60 degree angles. Finally, I show how you can find other sides/angles in a special triangle if you know what the angle is or how the sides are related.

[noahgrainger]

this is so much easier than my math teacher made it seem.
thanks

[davidtutorsmath]

You're welcome. Thanks for appreciating.

[davidtutorsmath]

Yeah, I subtracted wrong the first time, but if you keep watching I correct my mistake.

[iNinjeek]

You write pretty and thanks for the help!

[davidtutorsmath]

You're completely correct. I subtracted wrong. Thanks a bunch for pointing that out. I'll add a disclaimer.

[SoniaNYC]

FINALLY! I figured out in relation to what is the opposite and adjacent sides- the angle in question. :-) Sheer joy.

[xcbeasta]

do u have a word file for that work sheet

[davidtutorsmath]

I'm working on getting a website up. Currently they're available on my classroom moodle page which is open only to my students.

[ilykmlm]

It helped me tnx :D I dnt knw what my teacher is talking about lol

[nikkobendanio]

i like your accent and how you say ratio is like "rashiyowww" :))

[davidtutorsmath]

Thanks. It could also be that it didn't look quite as much like a foreign language the second time around.

[davidtutorsmath]

@iNinjeek Aaaawww shucks. Thanks for appreciating. Glad it helped. Keep studying hard.