Question

a pendulum length 21cm oscillates through an angel an of 36 find the length of path
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Answer 1

Answer:

length of path  l=13.188cm.

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Step-by-step explanation:

A pendulum length 21cm oscillates through an angel an of 36.we need to find the length of path.

​Since we know the formula from the trigonometry l=rθ

where l=length of path, r=length of pendulum ,θ=angle

since it is given in question l=? r=21cm, θ=36°

since we need to convert the degree in to radians

So applying the  $180 degree=\pi radians$

so,$36 degree =0.628radian$

Apply l=rθ

we get $l=21\times0.628$

so we get l=13.188cm.