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# A pendulum 20 cm long swings 3 degrees 30 minutes on each side of it's vertical position. Find the length of the arc formed by the tip of the pendulum.

I seriously need help understanding the concept

# Find the arc length of the curve?

Find the arc length of the curve defined by r(t)=(t, sqrt(6)/2*t^2, t^3), -1<=t<=1. r'(t)=<1, sqrt(6)t, 3t^2> sqrt(1+6t^2+9t^4) But how do I simplify this?

# What's the arc length for the curve?

What's the arc length for the curve defined by r(t)=3sin(t)i+3cos(t)j+4tk for 0<=t<=10? (Answer: 50) r'(t)=<3cost, -3sint, 4>

# What's the length of the curve?

What's the length of the curve r(t)=<2 cos t, 2 sin t, sqrt(5)> from 0<=t<=2pi?

# The length of an arc is 10cm. find the angle subtending by the arc if the circumference of the circle of which the arc forms part is 60cm.

The length of an arc is 10cm. find the angle subtending by the arc if the circumference of the circle of which the arc forms part is 60cm.

# arc length and parametric curves

I'm totally lost here: x= tcost y= tsint -1<or= t <or=1 find the arc length...   I understand the point is to find an anti-derivative using the sqrt of each term's derivative...