Evaluate a trigonometric value using period as an aide - Online Math Teacher

👉 Learn how to evaluate trigonometric functions of a given angle. Given an angle greater than 2pi in radians, to evaluate the trigonometric functions of the given angle, we first determine the smallest positive coterminal angle of the given angle. This we can do by subtracting 2pi or a multiple of 2pi from the given angle.

Coterminal angles are angles with the same terminal side. After obtaining the coterminal angle, we plot the angle on the x-y-coordinate plane and with the help of the Pythagoras theorem or the special angles, we can evaluate the trigonometric functions of the given angle.

Organized Videos:
✅ Trigonometric Functions and The Unit Circle
✅ The Unit Circle | Learn About
✅ Points of the Unit Circle | Learn About
✅ Angles of the Unit Circle | Learn About
✅ Trigonometric Functions of the Unit Circle
✅ Find the Point on the Unit Circle
✅ Evaluate Trigonometric Functions Using the Unit Circle
✅ Evaluate the Six Trigonometric Functions Given and Angle
✅ Evaluate trigonometric functions using a calculator
✅ Evaluate trigonometric functions using identities

Connect with me:

#trig #unitcircle #brianmclogan

[jakiyataniye]

You are literally the greatest math teacher ever!

[iZAPMath]

Here I find the best videos on trig, no gaps!

[puppermintbarkk]

wow... thank you so much!
i was stuck on this same exact problem for the last 20 minutes until i googled how to do it. turns out the first video i clicked on happened to be the one that actually makes sense to me!

[DanielaHernandez-esrt]

You are quite literally so awesome! I am taking this class online and you have been a blessing!

[sarahblack]

when you dropped your marker you looked like a bit of your soul died lol

[ReesRippleInDaHouse]

You are literally the best math teacher I've had...ever. 

[MrSlaughtematic]

Thanks for the video! Couldn't figure this out otherwise. Turns out this was problem 39 on page 274 in my book.

[osmanvalle]

My teacher sucks, all he does is make us read the book while he stays on the computer the whole period. I wish you were my teacher... :'(

[Sun.worlds]

I wish my school had more math teachers like you!

[ChargePositive]

Hey man I've been sick the past few days and you've done a great job keeping me caught up in math. Appreciate your videos!

[madhusundararajan]

why do you not add 1 to to the value of cos 2pi/3 since the value of cos 2pi is 1?

[gissellebv]

How and why does 2pi turn into 6pi/3??

[ChrittyMedia]

quick question. I noticed in one of your other videos that the first point you showed on here which you have as 1/2, squareroot of 3pi/2 in the other video it was the opposite that point was squareroot of 3pi/2, 1/2?

[minhtunguyen]

LOL. you dropped for marker! FUNNY omg xD