Need help with a triangle's length side/ angle relation.

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The discussion centers on understanding the equation x = sin(theta) presented in a video. The user questions the derivation of this equation, specifically regarding the relationship between the sine of theta and the sides of a triangle. It is clarified that sine of theta is indeed defined as the opposite side (x) over the hypotenuse. The hypotenuse in this context is identified as the length of the pendulum arm, which is 1. This reinforces the connection between the angle and the triangle's dimensions in the scenario discussed.
Dyatlov
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Hello.
I am trying to wrap my head around where from did he got the x = sin of theta equation at the 32:44 mark of the video: .
Isn't sine of theta x over the hypotenuse in the diagram ?
Thanks in advance!
 
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Dyatlov said:
Isn't sine of theta x over the hypotenuse in the diagram ?
Yes it is, and the length of the hypotenuse (=the pendulum arm) seems to be 1.
 

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