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

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    Angle Length Relation
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SUMMARY

The discussion centers on the derivation of the equation x = sin(θ) as presented in a video at the 32:44 mark. Participants confirm that the sine of angle θ is defined as the ratio of the opposite side (x) to the hypotenuse in a right triangle. In this specific context, the hypotenuse, representing the pendulum arm, is established to be 1 unit in length, simplifying the equation to x = sin(θ).

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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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