# trig

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in a circle of radius 26, find the length of the arc spanned by a central angle of pi/4 radians. round your answer to 2 decimal places. use 3.1416 as an approx for pi.

• trig -

Recall that C = rθ
Remember that for a whole circle, θ=2π, so C = 2πr

Here, we have r = 26, θ=π/4

c = 26 * π/4 = 13/2 * π = 20.42

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