I have a challenge in explaining the concepts of sine, cos and tan of trigonometry to a kid, as he just doesn’t seem to get it right. Is there a better method of explaining these concepts by relating it to some physical nature of the world so that the kid gets the concept right?
2026-05-06 07:02:21.1778050941
Explain trigonometry concepts to a kid
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One (The most?) important thing to start is to understand the concept of "similar triangles".
Consider the picture of a right triangle with hypotenuse equal to $1$. Of course, the two catetis are equal to $\sin(\theta)$ and $\cos(\theta)$.
Suppose that the kid is looking this on a smartphone. If he/she zooms with two fingers the screen of the smarthphone, then what he/she gets is a longer/shorter hypotenuse. The two catetis increased/decreased their length of the same factor of the hypotenuse.
This concept is sometimes (or many times?) tricky for older "kids" in college :D