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If sum(r=15)^29(cos(rpi/2+theta)=S1 and...

If `sum_(r=15)^29(cos(rpi/2+theta)=S_1` and `sum_(r=15)^29(sin(rpi/2+theta)=S_2`, then `S_1/S_2` equals

A

`cottheta`

B

`tan theta`

C

`-cot theta`

D

`-tan theta`

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The correct Answer is:
A
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