The unit circle - secret tricks to make trigonometry easy
6.7 هزار بار بازدید -
6 سال پیش
-
Solving trig equations, finding sin,
Solving trig equations, finding sin, cos, and tan of special angles, and certain trig identities are all much easier with these tricks, which I learned from Dr Norm Hoffman in afterschool mathematical problem-solving classes, and I haven't seen these techniques taught anywhere else.
In this introductory video I'll cover the definitions of sine, cosine, and tangent in the unit circle, and explain how angles are drawn in trigonometry (anticlockwise from the positive x-axis). Once you get the hang of cosine = x-coordinate, sine = y-coordinate, and tangent = slope, trigonometry becomes much easier.
I'm an online maths tutor. Go to http://thawom.com/tutoring to learn more.
Twitter: Twitter: thawom0
In this introductory video I'll cover the definitions of sine, cosine, and tangent in the unit circle, and explain how angles are drawn in trigonometry (anticlockwise from the positive x-axis). Once you get the hang of cosine = x-coordinate, sine = y-coordinate, and tangent = slope, trigonometry becomes much easier.
I'm an online maths tutor. Go to http://thawom.com/tutoring to learn more.
Twitter: Twitter: thawom0
6 سال پیش
در تاریخ 1397/11/02 منتشر شده
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