calcules help needed

label Calculus
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Apr 28th, 2015

12. Since the graph has 5 'petals', the period of the function is 2 pi/5, and the answer is C.

13. To find the area, use the formula in polar coordinates:

A = (1/2)∫0π/2 r2(θ)dθ = (1/2)∫0π/2 sin2(2θ)dθ =                                 use the identity sin2x = (1 – cos 2x)/2

(1/4)∫0π/2 (1 – cos(4θ))dθ = (¼) (θ – ¼ sin(4θ)) ] 0π/2 = π/8.

The answer is D.


Apr 28th, 2015

what about the first question 12=11

Apr 28th, 2015

What is the equation of the curve in #11? Could you post it?

Apr 28th, 2015

r=2(1-cos(theta))

Apr 28th, 2015

please answer it

Apr 28th, 2015

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